Golden Age incubation period era quarter lunar time period semester air alert travel time canicular days morning lifespan honeymoon Olympiad study hall Platonic year indiction puerperium running time noviciate great year real time millenary forenoon Indian summer regulation time time time off decennary blossom run century early days peak generation silver age quinquennium drought mid-October hebdomad week lease youth heyday mid-August school bimillennium phase bimillenary quadrennium Saint Martin's summer dark civil day midweek morn twelvemonth period of time enlistment fundamental measure millennium mid-June two weeks wartime usance field day rainy day fortnight clotting time bout overtime dog days prehistory question time eve schooltime duty tour daytime quarter-century prohibition era hospitalization stage morning time year school day nap month watch night calendar week multistage festival peacetime work time novitiate window flower long time occupation prehistoric culture bimester drouth weekend term time period term of enlistment mid-December mid-November times mid-February season mid-January time of life flush decade epoch life-time mid-May efflorescence years decennium elapsed time age duration half life prime silly season test period hitch mid-April day tide tour of duty lactation nighttime time limit calendar month extra time fundamental quantity mid-September term of a contract trial period lifetime evening shelf life continuance time frame uptime long haul yr lustrum daylight trimester long run prohibition reign tour past midwinter phase of the moon bloom half-century hours life calendar day iron age downtime sleep hour time of year mid-July bronze age mid-March dawn canicule half-life

orbit period interval time interval

punctuation mark stop full stop punctuation full point point suspension point

playing period division section part play period of play

emission expelling menstruum menstruation catamenia discharge menorrhagia hypermenorrhea oligomenorrhea flow menses

ending end

geological period era ice age glacial epoch geological era geologic time epoch geological time glacial period