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The following events happened in July 1980: ... issued an order requiring all female government employees to wear the full-length chador and the ... July 25, 1980 ...
For determination of the day of the week (1 January 2000, Saturday) the day of the month: 1 ~ 31 (1) the month: (6) the year: (0) the century mod 4 for the Gregorian calendar and mod 7 for the Julian calendar (0). adding 1+6+0+0=7. Dividing by 7 leaves a remainder of 0, so the day of the week is Saturday. The formula is w = (d + m + y + c) mod 7.
27 week years are 5 days longer than the month years (371 − 366), 6.75%. 44 week years are 6 days longer than the month years (371 − 365), 11%. 70 week years are 2 days shorter than the month years (364 − 366), 17.5%. 259 week years are 1 day shorter than the month years (364 − 365), 64.75%. The table shows the long years in a 400-year ...
July 25 (Eastern Orthodox liturgics) Earliest day on which Father's Day can fall, while July 31 is the latest; celebrated on last Sunday in July. (Dominican Republic) Earliest day on which National Tree Planting Day can fall, while July 31 is the latest; celebrated on last Sunday
ISO 8601 is an international standard covering the worldwide exchange and communication of date and time-related data.It is maintained by the International Organization for Standardization (ISO) and was first published in 1988, with updates in 1991, 2000, 2004, and 2019, and an amendment in 2022. [1]
GPS dates are expressed as a week number and a day-of-week number, with the week number initially using a ten-bit value and modernised GPS navigation messages using a 13-bit field. Ten-bit systems would roll over every 1024 weeks (about 19.6 years) after Sunday 6 January 1980 (the GPS epoch), and 13-bit systems roll over every 8192 weeks ...
July 25, 1980 () Robert Blake, Steve Landesberg: Carol Neblett: 4451: July 28, 1980 () Bert Convy (guest host), Orson Bean: Jim Stafford: 4452: July 30, 1980 () Angie Dickinson, Charles Nelson Reilly: Melissa Manchester
1980 was a leap year starting on Tuesday of the Gregorian calendar, the 1980th year of the Common Era (CE) and Anno Domini (AD) designations, the 980th year of the 2nd millennium, the 80th year of the 20th century, and the 1st year of the 1980s decade.