May 20, 2026Discover how the probability of having 53 Sundays in a year depends on the starting day and leap year status.

May 19, 2026Learn why the lunar cycle lasts about 29.5 days, not 27, and how it affects lunar calendar months in this short explanation.

May 18, 2026Learn how to calculate the number of weekdays in any month with Excel's NETWORKDAYS function, including holiday adjustments.

May 18, 2026Discover why Ethiopia’s calendar shows 2014 while the rest of the world uses the Gregorian calendar in 2021. Learn about Ethiopia’s unique calendar system.

May 16, 2026Learn why a month is generally longer than 4 weeks and how the variation in days affects scheduling and planning.

Apr 30, 2026Discover how many working days are typically in a month, factoring in weekends and public holidays. Learn what affects the count across different months.

Apr 10, 2026Discover why February has 29 days every four years to align our calendar with Earth's solar orbit in this brief explanation.