Tools

Explore free calendar tools to calculate age, count days between dates, add or subtract time, find business days, and convert time zones with the Almanac.

time zone converter, children of different ethnicities holding hands around the globe

Time Zone Converter: Convert U.S. & World Time Zones

Easily See the Time Difference Between Cities

Age Calculator: How Old Am I on a Certain Date?

Get the exact age in years, days—even seconds—with this tool!

Day Calculator: Quickly Count Days Between Dates

Stop guessing—start counting (the fun way)

Date Calculator: Subtract/Add Days to Any Date

Date Calculator — Add or Subtract Days, Weeks, Months, or Years

Need to Plan Ahead or Look Back? Let This Simple Date Tool Do the Math

Business Day Calculator: Count Work Days Between Two Dates

Calculate How Many Working Days–Without U.S. Holidays or Weekends

Day of the Week Calculator Feature Image

Day of the Week Calculator – What Day Is It?

Find Out What Day of the Week Any Date Lands On

Find out if today is a holiday in the United States

Is Today a Holiday? | U.S. Holidays, Folklore & Observances

Federal, State, and Folklore Holidays—All in One Place

Time Between Hours Calculator

Easily Find How Many Hours Between Two Times