First period

First period may refer to:

• First Period architecture, an American architectural 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 concept in Communist ideology discussed at Third Period
• First period as a school period

See also

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