Doomsday Day of the Week Calculator

Doomsday Day of the Week Calculator
Use this device to quickly find the day of the week for any date between 1901 and 2099.    Doomsday in this context does not refer to world catastrophe, but rather to particular dates in any given year which always fall on the same day.  That day is called the “Doomsday” for that given year. John Conway, UK mathematician, in 1973 developed a technique where a bright pers... Learn More+
Vat19 Indoor/Outdoor Sticker
Vat19 Indoor/Outdoor Sticker
Warheads Sour Jelly Pops
Warheads Sour Jelly Pops
Large 4 Foot Single Bunt - Rainbow Gay Pride Flag Fabric Bunting Home or Party Banner - LGBT Gay and Lesbian Pride Party Supplies / Home Decor
Large 4 Foot Single Bunt - Rainbow Gay Pride Flag Fabric Bunting Home or Party Banner - LGBT Gay and Lesbian Pride Party Supplies / Home Decor
Pair-it Puzzle
Pair-it Puzzle
Jan van Haasteren Comic Puzzle - The Locks (1000 Pieces)
Jan van Haasteren Comic Puzzle - The Locks (1000 Pieces)
Honey Bun Soda
Honey Bun Soda
2.5 Sun 5 Step Koyosegi / Natural
2.5 Sun 5 Step Koyosegi / Natural
World's Smallest Elf on the Shelf
World's Smallest Elf on the Shelf
Meet Me in Paris
Meet Me in Paris
MF8 Petaminx - Black Body
MF8 Petaminx - Black Body
2pc. Love Rainbow Dog Tag - LGBT Gay and Lesbian Pride Necklace
2pc. Love Rainbow Dog Tag - LGBT Gay and Lesbian Pride Necklace
Rounded Rainbow Inset Double Male Symbols Gay Pride Pendant - LGBT Pewter Gay Necklace for Men
Rounded Rainbow Inset Double Male Symbols Gay Pride Pendant - LGBT Pewter Gay Necklace for Men
Male & Female Symbols on Metal Panel Brown Leather Bracelet - Supporter LGBT Jewelry
Male & Female Symbols on Metal Panel Brown Leather Bracelet - Supporter LGBT Jewelry
Plush French Fries
Plush French Fries
Sydney Opera House 4x4x4 Cube - Version II
Sydney Opera House 4x4x4 Cube - Version II
Otter Tape Dispenser
Otter Tape Dispenser
Intersection
Intersection
Famous Trick Donkeys - Color - English
Famous Trick Donkeys - Color - English
Champagne Ball
Champagne Ball
Revolver Rotational Marble Puzzle
Revolver Rotational Marble Puzzle
My Favorite Food Is Snacks T-Shirt
My Favorite Food Is Snacks T-Shirt
Frame Pyraminx - 4 Color Transparent Glow-in-the-Dark
Frame Pyraminx - 4 Color Transparent Glow-in-the-Dark
6mm - Unisex (Women's or Men's) Black and Silver Two Tone Titanium Wedding Bands. High Polish Finish - Comfort Fit Ring is Light Weight
6mm - Unisex (Women's or Men's) Black and Silver Two Tone Titanium Wedding Bands. High Polish Finish - Comfort Fit Ring is Light Weight
Dumpling Steamer Humidifier
Dumpling Steamer Humidifier
The Wonderful Chinese Pony Puzzle - Trade Card
The Wonderful Chinese Pony Puzzle - Trade Card