Search results
Calculate the day of the week for: your birthday. next Christmas. a historical event, like the first Moon landing. Some dates fall on the same weekday every year. Use this knowledge to calculate the weekday of any given date in your head.
- Step 1: Memorizing Weekdays as Numbers
- Step 2: Memorizing The Anchor Days
- Step 3: Calculating The Doomsday of Any Given Year
- Step 4: Move from The Doomsday to The Date in Question
In Conway's concept, each weekday is represented by a number: Memorize these numbers before moving on. As a mental anchor, it may be helpful to think of Tuesday as “Twosday”.
Calendars repeat themselves every 400 years, so all you need to do is to remember the anchor days for 4 centuries. As most dates you will come across lie in the time span between 1800 and 2100 it is most practical to remember the anchor days for the 19th, 20th, 21st and 22nd century: For dates outside of this time frame you can simply rely on the 4...
To determine the doomsday of the year in question, you have to follow a series of 6 simple calculations. Before you start, don't forget to memorize the weekday numbers (see step 1) and century anchor days (see step 2). To illustrate the calculations, an example is given for each - let's say we want to find out which day of the week February 11, 197...
Now it is only a small step to the final result. You know the doomsday of the year (in 1978, it was Tuesday), and you know which dates of the year are doomsdays. Now you can simply use the doomsday closest to the date in question to find out which weekday it falls on. In the example date of February 11, 1978, the closest doomsday is the last day of...
Opinion polls suggest that one in ten Americans worry about whether they will survive past Dec 21 of this year, and middle-school teachers everywhere report that many of their students are fearful of a coming apocalypse. Following are brief facts that address these doomsday fears.
People also ask
What is a doomsday algorithm?
What is the Doomsday rule?
What makes the Doomsday algorithm tick?
Is the last day of February a doomsday?
Some believers in a 2012 doomsday used the term "galactic alignment" to describe a different phenomenon proposed by some scientists to explain a pattern in mass extinctions supposedly observed in the fossil record.
Calculate the weekday for any date in your head. Try our new Doomsday Calculator. In 1970, British mathematician John Conway devised a way to use the doomsday phenomenon to quickly calculate the weekday of any given date without the help of calculators, computers, or calendars.
Oct 18, 2011 · The so-called doomsday algorithm uses clever mental arithmetic and mnemonic tricks to enable a quick determination. Trick question: What day did September 6, 1752, fall on?
Doomsday Calculator. Enter any date, and find out what day of the week it would be using the Doomsday Rule! Please enter a year (1+) Please enter a month (1-12) Please enter a day (1-31) Calculate day of week!
