Thursday
The most recent year with the same day-date correlation as 1980 was 2008. The next year with the same day-date correlation as 1980 will be 2036.
According to the online calculator, the year of 535 started on a Monday. During the year 535, John II ended his reign as the Catholic Pope and St. Agapitus I began his.
The calendar in the year 1120 started on a Thursday. As a leap year, the year 1120 included an extra day. The next leap year starting on a Thursday will be in the year 2032. The previous was in the year 2004.
The three-day working week in the UK began on January 1, 1974, as a response to the energy crisis caused by the 1973 oil embargo. The government implemented this measure to conserve energy and reduce electricity consumption due to coal shortages. The initiative was intended to alleviate pressure on the national grid and manage the impact of industrial strikes in the coal industry.
Wednesday
It was a Tuesday.
The Sabbath occurs every week.
Yes they do.
Dates are written month/day/year in the US and day/month/year in most other countries. June 4 1980 was a Wednesday, and 6 April 1980 was a Sunday.
1980 was a leap year that started on a Tuesday, so March 4th was a Tuesday.
January 31st, 1980 fell on a Thursday. The following year, it fell on a Saturday.
July 30th, 1980 fell on a Wednesday. The following year, it fell on a Thursday.
According to the Gregorian calendar, the first day of the week of the year 480 "anno domini nostri iesu christi ", which has been a leap year, was a Monday.
January 1, 2009 fell on a Thursday.
It may begin on any day
Holy Week begins on the same day throughout the world. This year, it starts tomorrow, March 28th.
It was a Sunday.