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+
Snug Double Male Symbols Gay Pendant - Black LGBT Pewter Gay Necklace
Snug Double Male Symbols Gay Pendant - Black LGBT Pewter Gay Necklace
Ladies Claddagh Irish Celtic Ring - Heart & Crown - Steel Lovers Ring
Ladies Claddagh Irish Celtic Ring - Heart & Crown - Steel Lovers Ring
Scramble Squares - North American Birds
Scramble Squares - North American Birds
Elefantenrunde
Elefantenrunde
Women's Tungsten Wedding Band (6mm). Celtic Wedding Band Silver with Black and Silver Resin Inlay. Celtic Knot Tungsten Carbide Ring
Women's Tungsten Wedding Band (6mm). Celtic Wedding Band Silver with Black and Silver Resin Inlay. Celtic Knot Tungsten Carbide Ring
Dessert Scorpion
Dessert Scorpion
mf8 & Oskar More Madness Pyraminx - Black Body
mf8 & Oskar More Madness Pyraminx - Black Body
Black Baseball Cap with Gay Rainbow Squiggle - LGBT Gay and Lesbian Pride Hat. Gay and Lesbian Pride Clothing & Apparel
Black Baseball Cap with Gay Rainbow Squiggle - LGBT Gay and Lesbian Pride Hat. Gay and Lesbian Pride Clothing & Apparel
Bee Box
Bee Box
.Level 9 - a set of 11 wood puzzles
.Level 9 - a set of 11 wood puzzles
Jan van Haasteren Comic Puzzle - The Balloon Festival
Jan van Haasteren Comic Puzzle - The Balloon Festival
Leiden-schaft
Leiden-schaft
Fauler Hund
Fauler Hund
Am I Gay Yet - Gay and Lesbian Pride Navel / Belly Ring (Body Jewelry) Steel
Am I Gay Yet - Gay and Lesbian Pride Navel / Belly Ring (Body Jewelry) Steel
Oak Cube - 4 pc
Oak Cube - 4 pc
Canary in a Cage
Canary in a Cage
Karakuri New Secret Box II
Karakuri New Secret Box II
Classic ID Style Rainbow Chain Bracelet - Lesbian & Gay Pride LGBT Wristlet
Classic ID Style Rainbow Chain Bracelet - Lesbian & Gay Pride LGBT Wristlet
Intrepid - The Eye of the Ocean
Intrepid - The Eye of the Ocean
Metal Works Laser Cut Models
Metal Works Laser Cut Models
John Lin Squished Skewb Puzzle - Black Body
John Lin Squished Skewb Puzzle - Black Body
Gold Feather Pendant (PVC rope chain included)
Gold Feather Pendant (PVC rope chain included)
Extra Large - Lesbian and Gay Pride Rainbow Dream Catcher (6 Inch Top Loop) Dream Catcher. Great for homes, windows, rooms and more.
Extra Large - Lesbian and Gay Pride Rainbow Dream Catcher (6 Inch Top Loop) Dream Catcher. Great for homes, windows, rooms and more.
Ask Me About My Ninja Disguise Shirt
Ask Me About My Ninja Disguise Shirt
Unisex or Women's Tungsten Wedding Band (6mm). Black and 14K Yellow Gold Grooved Top and Inside. Matte Finish Tungsten Carbide Ring with Beveled Edges.
Unisex or Women's Tungsten Wedding Band (6mm). Black and 14K Yellow Gold Grooved Top and Inside. Matte Finish Tungsten Carbide Ring with Beveled Edges.