Month guides and calendar explanations
Clear answers about calendar months, date calculations and practical monthly planning.
How many days are in each month?
A complete guide to 28-, 29-, 30- and 31-day months.
Why is February the shortest month?
How Roman calendar history shaped February's unusual length.
Where the month names come from
The Roman roots behind the twelve English month names.
How much of the current month has passed?
Calculate a live percentage for the current calendar month.
How many working days are in a month?
Count weekdays and adjust for holidays, leave and local schedules.
How many weeks are in a month?
Why calendar months do not equal exactly four weeks.
Which months are in each quarter?
Map the twelve calendar months to Q1, Q2, Q3 and Q4.
Lunar month vs calendar month
Compare Moon cycles with Gregorian calendar months.
How to add or subtract calendar months
Handle month-end dates without overflowing into the wrong month.
A practical month-end planning method
Review the current month and prepare a realistic next-month plan.
Fiscal months and accounting periods
Why reporting months may not follow calendar boundaries.
How to read and build a monthly calendar
Create an accessible month grid with correct weekday alignment.
February 29 and leap day
When leap day occurs and how it affects dates and anniversaries.