a system of timekeeping that defines the beginning and length and divisions of the year

a list or register of events (appointments or social events or court cases etc)

a tabular array of the days (usually for one year)

enter into a calendar

a day reckoned from midnight to midnight

natural family planning in which ovulation is assumed to occur 14 days before the onset of a period (the fertile period would be assumed to extend from day 10 through day 18 of her cycle)

natural family planning in which ovulation is assumed to occur 14 days before the onset of a period (the fertile period would be assumed to extend from day 10 through day 18 of her cycle)

one of the twelve divisions of the calendar year

a period of seven consecutive days starting on Sunday

the year (reckoned from January 1 to December 31) according to Gregorian calendar