Calendar Origins

The answers to many questions about calendars

Calendar - from Middle English calender, Latin calendarium (account book). The Romans called the first day of each month Kalendae, or calends. Debts were due on this day, so books to track payments were called calendarium from which we get our modern day calendar.

Modern Calendar Origins:

Calendar Origins - Where did calendars begin?

Day Name Origins - Where did the Names of Days come from?

Calendar Name Origins - Where did the Names of Months come from?

Months of the Year Origin - Why 12 months in a year?

Why 28 days in February?

Who set the Year 0, AD, BC?

Calendars it Derived From:

Egyptian Calendar

Roman Calendar

Julian Calendar

Origin of Names of Days

Sunday - ME sun(nen)day, OE sunnandaeg, translation of Latin dies Solis, "Day of the Sun"
- ME mone(n)day, OE mondaeg, translation of Latin Lunae dies, "Day of the Moon"
Tuesday - ME tewesday, OE tiwesdaeg, OHG ziestac, Day of the war god Tiw, translation of the Latin dies Martis, "Day of Mars"
Wednesday - ME Wednesdai, OE wednesdaeg, mutated version of Wodnesdaeg, Woden's day, compare with Dutch Woensdag, Danish onsdag, translation of Latin Mercuru dies, Day of Mercury
Thursday - ME OE Thursdaeg from Norse Thursdagr, "Thor's day", Germanic translation of Latin dies Jovis.
Friday - ME OE Frigedaeg, "Freya's day"
Saturday - ME Saturdai, OE Saternesdaeg, partial translation of Latin Saturni dies, "Saturn's day

ME = Middle English
OE = Old English
OF = Old French
OHG = Old High German

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