Hacker Perspective: Four Popular Calendars (of many)
| Solar | Lunar | ||||||
|---|---|---|---|---|---|---|---|
| Julian | Gregorian (modern) |
Hebrew | Muslim | ||||
| Month Names | days | Month Names | days | Month Names | days | Month Names | days |
| January | 31 | January | 31 | Tishri | 30 | Muharram | 30 |
| February | 28+1 | February | 28+1 | Heshvan | 29-30 | Safar | 29 |
| March | 31 | March | 31 | Kislev | 29 | Rabi I | 30 |
| April | 30 | April | 30 | Tevet | 29-30 | Rabi II | 29 |
| May | 31 | May | 31 | Shevat | 30 | Jumada I | 30 |
| June | 30 | June | 30 | Adar | 29-30 | Jumada II | 29 |
| July | 31 | July | 31 | Nisan | 30 | Rajab | 30 |
| August | 31 | August | 31 | Iyar | 29 | Sha'ban | 29 |
| September | 30 | September | 30 | Sivan | 30 | Ramadan | 30 |
| October | 31 | October | 31 | Tammuz | 29 | Shawwal | 29 |
| November | 30 | November | 30 | Av | 30 | Dhu al-Qa'dah | 30 |
| December | 31 | December | 31 | Elul | 29 | Dhu al Hijjah | 29-30 |
| Total Days | 365.25 | 365.242193 | 354-355 | 354-355 | |||
- General
- x + 1 (means month length increases during specified calendar's leap year)
- x - y (means that month length is periodically changed for lunar alignment)
- Julian (named after Julius Caesar)
- solar calendar
- 365.25 days long (yes, the Romans had leap years every four years)
- Gregorian (named after Pope Gregory)
- solar calendar
- 365.242193 days long, not 365.25 days as most people think.
- Hebrew
- lunar calendar
- year 5743 coincided with September 18, 1982 through August 10, 1983.
- Muslim
- lunar calendar
- year 1396, Muharram coincided corresponded with January 1976.
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Calendar Time, Y2k etc.
Back to HomeNeil Rieck
Waterloo, Ontario, Canada.