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Understanding >Astronomical calculations

CALENDAR OF THE YEAR 2021





    ************************************************************************************************************
    *                                                                                                          *
    *                                            2021.-CALENDAR-.                                            *
    *                                                                                                          *
    *               JANUARY                           FEBRUARY                            MARCH                 *
    *    ------------------------------    ------------------------------    ------------------------------    *
    *            DAY           DAY & NO            DAY           DAY & NO            DAY           DAY & NO    *
    *    -------------------  ---------    -------------------  ---------    -------------------  ---------    *
    *     OF  OF THE JULIAN     OF THE      OF  OF THE JULIAN     OF THE      OF  OF THE JULIAN     OF THE     *
    *    MONTH YEAR ELAPSED     WEEK       MONTH YEAR ELAPSED     WEEK       MONTH YEAR ELAPSED     WEEK       *
    *              AT 12H UTC                         AT 12H UTC                         AT 12H UTC               *
    *    -------------------  ---------    -------------------  ---------    -------------------  ---------    *
    *                  245                               245                               245                 *
    *                                                                                                          *
    *      1     1    9216    FRI.           1    32    9247    MON. ----      1    60    9275    MON. ----    *
    *      2     2    9217    SAM.           2    33    9248    TUE.           2    61    9276    TUE.         *
    *      3     3    9218    SUN. ----      3    34    9249    WED.           3    62    9277    WED.         *
    *      4     4    9219    MON. ----      4    35    9250    THU.  5 !      4    63    9278    THU.  9 !    *
    *      5     5    9220    TUE.           5    36    9251    FRI.           5    64    9279    FRI.         *
    *      6     6    9221    WED.           6    37    9252    SAM.           6    65    9280    SAM.         *
    *      7     7    9222    THU.  1 !      7    38    9253    SUN. ----      7    66    9281    SUN. ----    *
    *      8     8    9223    FRI.           8    39    9254    MON. ----      8    67    9282    MON. ----    *
    *      9     9    9224    SAM.           9    40    9255    TUE.           9    68    9283    TUE.         *
    *     10    10    9225    SUN. ----     10    41    9256    WED.          10    69    9284    WED.         *
    *     11    11    9226    MON. ----     11    42    9257    THU.  6 !     11    70    9285    THU. 10 !    *
    *     12    12    9227    TUE.          12    43    9258    FRI.          12    71    9286    FRI.         *
    *     13    13    9228    WED.          13    44    9259    SAM.          13    72    9287    SAM.         *
    *     14    14    9229    THU.  2 !     14    45    9260    SUN. ----     14    73    9288    SUN. ----    *
    *     15    15    9230    FRI.          15    46    9261    MON. ----     15    74    9289    MON. ----    *
    *     16    16    9231    SAM.          16    47    9262    TUE.          16    75    9290    TUE.         *
    *     17    17    9232    SUN. ----     17    48    9263    WED.          17    76    9291    WED.         *
    *     18    18    9233    MON. ----     18    49    9264    THU.  7 !     18    77    9292    THU. 11 !    *
    *     19    19    9234    TUE.          19    50    9265    FRI.          19    78    9293    FRI.         *
    *     20    20    9235    WED.          20    51    9266    SAM.          20    79    9294    SAM.         *
    *     21    21    9236    THU.  3 !     21    52    9267    SUN. ----     21    80    9295    SUN. ----    *
    *     22    22    9237    FRI.          22    53    9268    MON. ----     22    81    9296    MON. ----    *
    *     23    23    9238    SAM.          23    54    9269    TUE.          23    82    9297    TUE.         *
    *     24    24    9239    SUN. ----     24    55    9270    WED.          24    83    9298    WED.         *
    *     25    25    9240    MON. ----     25    56    9271    THU.  8 !     25    84    9299    THU. 12 !    *
    *     26    26    9241    TUE.          26    57    9272    FRI.          26    85    9300    FRI.         *
    *     27    27    9242    WED.          27    58    9273    SAM.          27    86    9301    SAM.         *
    *     28    28    9243    THU.  4 !     28    59    9274    SUN. ----     28    87    9302    SUN. ----    *
    *     29    29    9244    FRI.                                            29    88    9303    MON. ----    *
    *     30    30    9245    SAM.                                            30    89    9304    TUE.         *
    *     31    31    9246    SUN. ----                                       31    90    9305    WED.         *
    *    ------------------------------    ------------------------------    ------------------------------    *
    *                                                                                                          *
    *                                                                                                          *
    ************************************************************************************************************







    ************************************************************************************************************
    *                                                                                                          *
    *                                            2021.-CALENDAR-.                                            *
    *                                                                                                          *
    *                APRIL                              MAY                               JUNE                 *
    *    ------------------------------    ------------------------------    ------------------------------    *
    *            DAY           DAY & NO            DAY           DAY & NO            DAY           DAY & NO    *
    *    -------------------  ---------    -------------------  ---------    -------------------  ---------    *
    *     OF  OF THE JULIAN     OF THE      OF  OF THE JULIAN     OF THE      OF  OF THE JULIAN     OF THE     *
    *    MONTH YEAR ELAPSED     WEEK       MONTH YEAR ELAPSED     WEEK       MONTH YEAR ELAPSED     WEEK       *
    *              AT 12H UTC                         AT 12H UTC                         AT 12H UTC               *
    *    -------------------  ---------    -------------------  ---------    -------------------  ---------    *
    *                  245                               245                               245                 *
    *                                                                                                          *
    *      1    91    9306    THU. 13 !      1   121    9336    SAM.           1   152    9367    TUE.         *
    *      2    92    9307    FRI.           2   122    9337    SUN. ----      2   153    9368    WED.         *
    *      3    93    9308    SAM.           3   123    9338    MON. ----      3   154    9369    THU. 22 !    *
    *      4    94    9309    SUN. ----      4   124    9339    TUE.           4   155    9370    FRI.         *
    *      5    95    9310    MON. ----      5   125    9340    WED.           5   156    9371    SAM.         *
    *      6    96    9311    TUE.           6   126    9341    THU. 18 !      6   157    9372    SUN. ----    *
    *      7    97    9312    WED.           7   127    9342    FRI.           7   158    9373    MON. ----    *
    *      8    98    9313    THU. 14 !      8   128    9343    SAM.           8   159    9374    TUE.         *
    *      9    99    9314    FRI.           9   129    9344    SUN. ----      9   160    9375    WED.         *
    *     10   100    9315    SAM.          10   130    9345    MON. ----     10   161    9376    THU. 23 !    *
    *     11   101    9316    SUN. ----     11   131    9346    TUE.          11   162    9377    FRI.         *
    *     12   102    9317    MON. ----     12   132    9347    WED.          12   163    9378    SAM.         *
    *     13   103    9318    TUE.          13   133    9348    THU. 19 !     13   164    9379    SUN. ----    *
    *     14   104    9319    WED.          14   134    9349    FRI.          14   165    9380    MON. ----    *
    *     15   105    9320    THU. 15 !     15   135    9350    SAM.          15   166    9381    TUE.         *
    *     16   106    9321    FRI.          16   136    9351    SUN. ----     16   167    9382    WED.         *
    *     17   107    9322    SAM.          17   137    9352    MON. ----     17   168    9383    THU. 24 !    *
    *     18   108    9323    SUN. ----     18   138    9353    TUE.          18   169    9384    FRI.         *
    *     19   109    9324    MON. ----     19   139    9354    WED.          19   170    9385    SAM.         *
    *     20   110    9325    TUE.          20   140    9355    THU. 20 !     20   171    9386    SUN. ----    *
    *     21   111    9326    WED.          21   141    9356    FRI.          21   172    9387    MON. ----    *
    *     22   112    9327    THU. 16 !     22   142    9357    SAM.          22   173    9388    TUE.         *
    *     23   113    9328    FRI.          23   143    9358    SUN. ----     23   174    9389    WED.         *
    *     24   114    9329    SAM.          24   144    9359    MON. ----     24   175    9390    THU. 25 !    *
    *     25   115    9330    SUN. ----     25   145    9360    TUE.          25   176    9391    FRI.         *
    *     26   116    9331    MON. ----     26   146    9361    WED.          26   177    9392    SAM.         *
    *     27   117    9332    TUE.          27   147    9362    THU. 21 !     27   178    9393    SUN. ----    *
    *     28   118    9333    WED.          28   148    9363    FRI.          28   179    9394    MON. ----    *
    *     29   119    9334    THU. 17 !     29   149    9364    SAM.          29   180    9395    TUE.         *
    *     30   120    9335    FRI.          30   150    9365    SUN. ----     30   181    9396    WED.         *
    *                                       31   151    9366    MON. ----                                      *
    *    ------------------------------    ------------------------------    ------------------------------    *
    *                                                                                                          *
    *                                                                                                          *
    ************************************************************************************************************







    ************************************************************************************************************
    *                                                                                                          *
    *                                            2021.-CALENDAR-.                                            *
    *                                                                                                          *
    *               JULY                             AUGUST                           SEPTEMBER               *
    *    ------------------------------    ------------------------------    ------------------------------    *
    *            DAY           DAY & NO            DAY           DAY & NO            DAY           DAY & NO    *
    *    -------------------  ---------    -------------------  ---------    -------------------  ---------    *
    *     OF  OF THE JULIAN     OF THE      OF  OF THE JULIAN     OF THE      OF  OF THE JULIAN     OF THE     *
    *    MONTH YEAR ELAPSED     WEEK       MONTH YEAR ELAPSED     WEEK       MONTH YEAR ELAPSED     WEEK       *
    *              AT 12H UTC                         AT 12H UTC                         AT 12H UTC               *
    *    -------------------  ---------    -------------------  ---------    -------------------  ---------    *
    *                  245                               245                               245                 *
    *                                                                                                          *
    *      1   182    9397    THU. 26 !      1   213    9428    SUN. ----      1   244    9459    WED.         *
    *      2   183    9398    FRI.           2   214    9429    MON. ----      2   245    9460    THU. 35 !    *
    *      3   184    9399    SAM.           3   215    9430    TUE.           3   246    9461    FRI.         *
    *      4   185    9400    SUN. ----      4   216    9431    WED.           4   247    9462    SAM.         *
    *      5   186    9401    MON. ----      5   217    9432    THU. 31 !      5   248    9463    SUN. ----    *
    *      6   187    9402    TUE.           6   218    9433    FRI.           6   249    9464    MON. ----    *
    *      7   188    9403    WED.           7   219    9434    SAM.           7   250    9465    TUE.         *
    *      8   189    9404    THU. 27 !      8   220    9435    SUN. ----      8   251    9466    WED.         *
    *      9   190    9405    FRI.           9   221    9436    MON. ----      9   252    9467    THU. 36 !    *
    *     10   191    9406    SAM.          10   222    9437    TUE.          10   253    9468    FRI.         *
    *     11   192    9407    SUN. ----     11   223    9438    WED.          11   254    9469    SAM.         *
    *     12   193    9408    MON. ----     12   224    9439    THU. 32 !     12   255    9470    SUN. ----    *
    *     13   194    9409    TUE.          13   225    9440    FRI.          13   256    9471    MON. ----    *
    *     14   195    9410    WED.          14   226    9441    SAM.          14   257    9472    TUE.         *
    *     15   196    9411    THU. 28 !     15   227    9442    SUN. ----     15   258    9473    WED.         *
    *     16   197    9412    FRI.          16   228    9443    MON. ----     16   259    9474    THU. 37 !    *
    *     17   198    9413    SAM.          17   229    9444    TUE.          17   260    9475    FRI.         *
    *     18   199    9414    SUN. ----     18   230    9445    WED.          18   261    9476    SAM.         *
    *     19   200    9415    MON. ----     19   231    9446    THU. 33 !     19   262    9477    SUN. ----    *
    *     20   201    9416    TUE.          20   232    9447    FRI.          20   263    9478    MON. ----    *
    *     21   202    9417    WED.          21   233    9448    SAM.          21   264    9479    TUE.         *
    *     22   203    9418    THU. 29 !     22   234    9449    SUN. ----     22   265    9480    WED.         *
    *     23   204    9419    FRI.          23   235    9450    MON. ----     23   266    9481    THU. 38 !    *
    *     24   205    9420    SAM.          24   236    9451    TUE.          24   267    9482    FRI.         *
    *     25   206    9421    SUN. ----     25   237    9452    WED.          25   268    9483    SAM.         *
    *     26   207    9422    MON. ----     26   238    9453    THU. 34 !     26   269    9484    SUN. ----    *
    *     27   208    9423    TUE.          27   239    9454    FRI.          27   270    9485    MON. ----    *
    *     28   209    9424    WED.          28   240    9455    SAM.          28   271    9486    TUE.         *
    *     29   210    9425    THU. 30 !     29   241    9456    SUN. ----     29   272    9487    WED.         *
    *     30   211    9426    FRI.          30   242    9457    MON. ----     30   273    9488    THU. 39 !    *
    *     31   212    9427    SAM.          31   243    9458    TUE.                                           *
    *    ------------------------------    ------------------------------    ------------------------------    *
    *                                                                                                          *
    *                                                                                                          *
    ************************************************************************************************************







    ************************************************************************************************************
    *                                                                                                          *
    *                                            2021.-CALENDAR-.                                            *
    *                                                                                                          *
    *               OCTOBER                           NOVEMBER                          DECEMBER               *
    *    ------------------------------    ------------------------------    ------------------------------    *
    *            DAY           DAY & NO            DAY           DAY & NO            DAY           DAY & NO    *
    *    -------------------  ---------    -------------------  ---------    -------------------  ---------    *
    *     OF  OF THE JULIAN     OF THE      OF  OF THE JULIAN     OF THE      OF  OF THE JULIAN     OF THE     *
    *    MONTH YEAR ELAPSED     WEEK       MONTH YEAR ELAPSED     WEEK       MONTH YEAR ELAPSED     WEEK       *
    *              AT 12H UTC                         AT 12H UTC                         AT 12H UTC               *
    *    -------------------  ---------    -------------------  ---------    -------------------  ---------    *
    *                  245                               245                               245                 *
    *                                                                                                          *
    *      1   274    9489    FRI.           1   305    9520    MON. ----      1   335    9550    WED.         *
    *      2   275    9490    SAM.           2   306    9521    TUE.           2   336    9551    THU. 48 !    *
    *      3   276    9491    SUN. ----      3   307    9522    WED.           3   337    9552    FRI.         *
    *      4   277    9492    MON. ----      4   308    9523    THU. 44 !      4   338    9553    SAM.         *
    *      5   278    9493    TUE.           5   309    9524    FRI.           5   339    9554    SUN. ----    *
    *      6   279    9494    WED.           6   310    9525    SAM.           6   340    9555    MON. ----    *
    *      7   280    9495    THU. 40 !      7   311    9526    SUN. ----      7   341    9556    TUE.         *
    *      8   281    9496    FRI.           8   312    9527    MON. ----      8   342    9557    WED.         *
    *      9   282    9497    SAM.           9   313    9528    TUE.           9   343    9558    THU. 49 !    *
    *     10   283    9498    SUN. ----     10   314    9529    WED.          10   344    9559    FRI.         *
    *     11   284    9499    MON. ----     11   315    9530    THU. 45 !     11   345    9560    SAM.         *
    *     12   285    9500    TUE.          12   316    9531    FRI.          12   346    9561    SUN. ----    *
    *     13   286    9501    WED.          13   317    9532    SAM.          13   347    9562    MON. ----    *
    *     14   287    9502    THU. 41 !     14   318    9533    SUN. ----     14   348    9563    TUE.         *
    *     15   288    9503    FRI.          15   319    9534    MON. ----     15   349    9564    WED.         *
    *     16   289    9504    SAM.          16   320    9535    TUE.          16   350    9565    THU. 50 !    *
    *     17   290    9505    SUN. ----     17   321    9536    WED.          17   351    9566    FRI.         *
    *     18   291    9506    MON. ----     18   322    9537    THU. 46 !     18   352    9567    SAM.         *
    *     19   292    9507    TUE.          19   323    9538    FRI.          19   353    9568    SUN. ----    *
    *     20   293    9508    WED.          20   324    9539    SAM.          20   354    9569    MON. ----    *
    *     21   294    9509    THU. 42 !     21   325    9540    SUN. ----     21   355    9570    TUE.         *
    *     22   295    9510    FRI.          22   326    9541    MON. ----     22   356    9571    WED.         *
    *     23   296    9511    SAM.          23   327    9542    TUE.          23   357    9572    THU. 51 !    *
    *     24   297    9512    SUN. ----     24   328    9543    WED.          24   358    9573    FRI.         *
    *     25   298    9513    MON. ----     25   329    9544    THU. 47 !     25   359    9574    SAM.         *
    *     26   299    9514    TUE.          26   330    9545    FRI.          26   360    9575    SUN. ----    *
    *     27   300    9515    WED.          27   331    9546    SAM.          27   361    9576    MON. ----    *
    *     28   301    9516    THU. 43 !     28   332    9547    SUN. ----     28   362    9577    TUE.         *
    *     29   302    9517    FRI.          29   333    9548    MON. ----     29   363    9578    WED.         *
    *     30   303    9518    SAM.          30   334    9549    TUE.          30   364    9579    THU. 52 !    *
    *     31   304    9519    SUN. ----                                       31   365    9580    FRI.         *
    *    ------------------------------    ------------------------------    ------------------------------    *
    *                                                                                                          *
    *                                                                                                          *
    ************************************************************************************************************