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Physics
Mathematics
Calendar
All Subcategories (17)
Comparison of calendars
Date
Days of the week
Days of the year
Determining future day of the week
February
Holidays
Holidays and Celebrations
Leap Years
Length of Year
March
Months
Months of the Year
Naming of Spring
Number of days
Time
Year-end holidays
Parent Categories (11)
Ancient Egypt
Basic Arithmetic
French Culture
General Information
General Knowledge
History
Mathematics
Religion
Time
Time and Dates
Timekeeping