Time interval

gestational age Period Boring Billion window of opportunity season 60-minute intervals teaching unit contingency allowance K'in hour working time witching hour run time 200 days of dread standard time postprandial embryonic age calendar year bar Compile time floruit millennium quarter of an hour decade geochronological unit ancient history short-run birth interval timeframe Elmore delay 360-day calendar Years of Lead interglacial period Dark ages of Cambodia age of the universe month synodic period generation time day year century Albania in the Middle Ages anthesis glacial period Reconstruction Era era perioperative period stage Magic 45 minutes refractory period