Age & birthday guides
Plain-language answers to the questions behind your birthday — how old you really are, in every unit of time, and everything a single date can tell you.
August 26, 2026
How old am I in days, hours, minutes and seconds?
Convert your age into days, hours, minutes and seconds — with conversion tables, a worked example, and the milestones worth watching for.
Read the guide →August 26, 2026
What day of the week was I born on?
Find the weekday of your birth date, learn the Doomsday trick, and see the old Monday's Child rhyme in full.
Read the guide →August 26, 2026
How to calculate your exact age from your date of birth
The right way to work out age in years, months and days by hand — with worked examples, a spreadsheet shortcut and the edge cases.
Read the guide →August 26, 2026
Chronological age vs. biological age: what's the difference?
Chronological age counts the calendar; biological age estimates how your body is doing. Here's how they differ.
Read the guide →August 26, 2026
How many days until my next birthday?
How the birthday countdown is calculated, the leap-year edge case, half-birthdays, the birthday paradox and milestones.
Read the guide →September 7, 2026
The Desi (Punjabi Bikrami) calendar: all 12 months explained
The Punjabi solar calendar, month by month — Chet to Phagan, with Urdu names, seasons and the festivals that mark each one.
Read the guide →September 7, 2026
The 27 Vedic Nakshatras and their meanings
What the 27 lunar mansions of Vedic astrology are, their ruling planets and padas, and how your birth star is found.
Read the guide →September 7, 2026
The Islamic Hijri calendar, explained
How the Islamic lunar calendar works — its 12 months, why the dates move each year, and how a Gregorian birth date converts.
Read the guide →