Calendar converts dates from different calendar systems.

Available are

• Julian date
• Modified Julian date
• Julian calendar
• Gregorian calendar
• Islamic calendar
• Persian calendar (Yazdegard)
• Hebrew calendar
• Coptic calendar (Diocletian)
• Mayan calendar
• Potrzebie calendar (MAD, Donald E. Knuth)
• UNIX Timestamp
• EXCEL Timestamp

Additionally the day of the week is given.