Back غرة (تقويم) Arabic Календи Bulgarian Calendae Breton Calendas Catalan Calenda Corsican Římská datace#Kalendy Czech Kalenden German Καλένδες Greek Kalendoj Esperanto Calendas Spanish
The calends or kalends (Latin: kalendae) is the first day of every month in the Roman calendar. The English word "calendar" is derived from this word.