First period

First period may refer to:

• First Period, American architecture style originating between approximately 1626 and 1725
• First menstrual bleeding at Menarche
• First period of the three periods in ice hockey#Periods and overtime
• First period of chemical elements at Period 1 element
• First Period, a communist doctrinaire period discussed at Third Period
• First period as a school period

See also

• Period (disambiguation)
• First Intermediate Period of Egypt, in ancient Egyptian history from c. 2181–2055 BC
• First Palace Period, in Minoan architecture from c. 1925-1875 BC
• First Stadtholderless Period, in the history of the Dutch Republic from 1650–1672