Seasons And Holidays calculators
10 calculators Christmas Countdown Calculator Find how many days, weeks, weekdays and weekends remain until Christmas. See the day it falls on, shipping cut-off dates, and a full holiday milestone schedule.
Open Christmas Tree Calculator Calculate exactly how many lights, ornaments, garland, ribbon, and tinsel you need for your Christmas tree. Enter height and width for an instant shopping list.
Open Easter Calculator Find Easter Sunday for any year 1583-2999. Get Western and Orthodox Easter dates, the Paschal Full Moon, days until Easter, and a step-by-step algorithm walkthrough.
Open Mayan Calendar Converter Convert any Gregorian date to the Maya Long Count, Tzolk'in, and Haab' calendar systems. Includes Lord of the Night, reverse lookup, and step-by-step math.
Open New Year's Resolutions Calculator Calculate how likely your New Year's resolution is to succeed. Get a commitment score, weekly target, and a week-by-week progress schedule for any goal.
Open Snowman Calculator Calculate perfect snowman proportions, ball diameters, total height, weight and yard area needed. Choose 1:2:3, Fibonacci 3:5:8 or golden-ratio sizing.
Open Trick-or-Treat Calculator Plan Halloween candy with our trick-or-treat calculator. Estimate bags to buy, candy haul for kids, cost, and leftovers based on hours, visitors, and weather.
Open Vampire Apocalypse Calculator Model a vampire outbreak with the Lotka-Volterra predator-prey equation. Set human, vampire, and slayer populations and see how many decades humanity survives.
Open White Christmas Calculator Find the historical probability of a White Christmas for your city. Based on NOAA climate normals: chance of 1, 5, or 10 inches of snow on December 25.
Open Zombie Invasion Calculator Simulate a zombie outbreak day by day. Set populations, attack rate, transformation probability, and fighting skill to see if humanity survives or the horde wins.
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