暦 - calendar, almanac

kanreki; one's 60th birthday (or 61st in the traditional age reckoning system) when one has lived through a full sexagenary cycle

calendar; almanac

Common Era; CE; Christian Era; anno domini; AD

Japan's old (lunisolar) calendar

Jewish calendar

calendar-construction rules

calendar year

study of the calendar

solar calendar

former grand champion's 60th birthday ring-entering ceremony

former grand champion's 60th birthday ring-entering ceremony

lunisolar calendar