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Calendar Converter (5200 words) |
 | The Gregorian calendar was proclaimed by Pope Gregory XIII and took effect in most Catholic states in 1582, in which October 4, 1582 of the Julian calendar was followed by October 15 in the new calendar, correcting for the accumulated discrepancy between the Julian calendar and the equinox as of that date. |
| The Bahá'í calendar is a solar calendar organised as a hierarchy of cycles, each of length 19, commemorating the 19 year period between the 1844 proclamation of the Báb in Shiraz and the revelation by Bahá'u'lláh in 1863. |
| Since year 1 of the Indian calendar differs from year 1 of the Gregorian, to determine whether a year in the Indian calendar is a leap year, add 78 to the year of the Saka era then apply the Gregorian calendar rule to the sum. |
| Judaism 101: Jewish Calendar (1587 words) |
| A few years ago, I was in a synagogue, and I overheard one man ask another, "When is Chanukkah this year?" The other man smiled slyly and replied, "Same as always: the 25th of Kislev." This humorous comment makes an important point: the date of Jewish holidays does not change from year to year. |
| The Jewish calendar is based on three astronomical phenomena: the rotation of the Earth about its axis (a day); the revolution of the moon about the Earth (a month); and the revolution of the Earth about the sun (a year). |
| After many years of blissful ignorance, I finally sat down and worked out the mathematics involved, and I have added a page on The Jewish Calendar: A Closer Look, which may be of interest to those who want a deeper understanding or who want to write a Jewish calendar computer program. |
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