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The basic approach of nearly all of the methods to calculate the day of the week begins by starting from an "anchor date": a known pair (such as 1 January 1800 as a Wednesday), determining the number of days between the known day and the day that you are trying to determine, and using arithmetic modulo 7 to find a new numerical day of the week.
The number of days between two dates, which is simply the difference in their Julian day numbers. The dates of moveable holidays, like Christian Easter (the calculation is known as Computus) followed up by Ascension Thursday and Pentecost or Advent Sundays, or the Jewish Passover, for a given year. Converting a date between different calendars.
The conventions are distinguished by the manner in which they adjust Date1 and/or Date2 for the end of the month. Each convention has a set of rules directing the adjustments. Treating a month as 30 days and a year as 360 days was devised for its ease of calculation by hand compared with manually calculating the actual days between two dates.
Here's a fairly comprehensive list of dates to know about for 2024: Catch up on 2023: 12 South Jersey stories from 2023 and what happened after the headlines In and out: What's in and what's out?
The weekdays and weekend are the complementary parts of the week devoted to labour and rest, respectively. The legal weekdays (British English), or workweek (American English), is the part of the seven-day week devoted to working. In most of the world, the workweek is from Monday to Friday and the weekend is Saturday and Sunday.
When using serial numbers for dates (e.g. in spreadsheets), doy is the serial number for a date minus the serial number for 31st December of the previous year, or alternatively minus the serial number for 1st January the same year plus one. Algorithm. Subtract the weekday number from the ordinal day of the year. Add 10. Divide by 7, discard the ...
In business, the trading day or regular trading hours (RTH) is the time span that a stock exchange is open, as opposed to electronic or extended trading hours (ETH). For example, the New York Stock Exchange is, as of 2020, open from 9:30 AM Eastern Time to 4:00 PM Eastern Time.
A long weekend is a weekend that is at least three days long (i.e. a three-day weekend), due to a public or unofficial holiday occurring on either the following Monday or the preceding Friday. Many countries also have four-day weekends , in which two days adjoining the weekend are holidays.