Calendar Comparisons
A calendar is a system in which different cultures and people around the world use for organizing for social, religious, and other purposes. Although the calendar is used for the same purpose, there is more than one calendar out there. Below you will find various calendars and how they differ from each other:
| Name | Type | Months in Year | Days in Year | Days in Months | Days in Week | Leap Days | Leap Months |
| Gregorian | Solar | 12 | 365 or 366 | 28, 29, 30 or 31 | 7 | Yes | No |
| Julian | Solar | 12 | 365 or 366 | 28, 29, 30 or 31 | 7 | Yes | No |
| Hebrew | Solar and Lunar | 12 or 13 | 353, 355, 383 or 385 | 29 or 30 | 7 | Yes | Yes |
| ISO | Solar | 12 | 365 or 366 | 28, 29, 30 or 31 | 7 | Yes | No |
| Coptic and Ethiopic | Solar | 13 | 365 or 366 | 5, 6 or 30 | ? | Yes | No |
| Islamic | Lunar | 12 | 354 or 355 | 29 or 30 | 7 | Yes | No |
| Persian | Solar | 12 | 365 or 366 | 29, 30 or 31 | 7 | Yes | No |
| Baha'i | Solar | 20 | 365 or 366 | 4, 5 or 19 | 7 | Yes | No |
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