What Day Was I Born? Weekday Method and the Sunrise Vaar

“What day was I born?” has two answers in India, and for most of the clock day they agree. The calendar on the wall changes its weekday at midnight. The panchang changes its vaar at sunrise. A birth in the daytime or evening gets the same day from both. A birth between midnight and sunrise does not: the calendar has already moved on to the new weekday, while the panchang is still counting the night of the day before.

That is not a rare corner of the clock. In 2027, 22.1% of all clock time at Guwahati falls between midnight and sunrise, rising to 27.4% at Ahmedabad; at Delhi it is 26.1%. So roughly one minute in four sits in that gap. This page gives a way to work out the weekday of any date by hand, a table to check it against, and the sunrise rule that settles the vaar.

Finding the Weekday of a Date by Hand

The method used for calendar problems in aptitude and exam books counts “odd days”, the days left over once every whole week is taken out. Add up the odd days from the start of the calendar to the date, divide by seven, and the remainder is the weekday: 0 is Sunday, 1 Monday, and so on to 6 for Saturday.

• Completed centuries. Each complete 400 years gives 0. After the last multiple of 400, 100 completed years give 5 odd days, 200 give 3 and 300 give 1.
• Completed years of the current century. An ordinary year is 52 weeks and 1 day, so it gives 1; a leap year gives 2.
• Completed months of the birth year. Use the table below, adding one for February in a leap year.
• The date itself. Add the day of the month.

Worked through for 15 August 1947: 1,946 years have been completed. 1,600 of them give 0 and the next 300 give 1. The remaining 46 years hold 11 leap years and 35 ordinary ones, so 11 × 2 + 35 = 57, which leaves 1 after the weeks are taken out. January to July 1947 give 16 odd days, or 2. Add the 15th: 1 + 1 + 2 + 15 = 19, and 19 divided by 7 leaves 5. The answer is Friday.

A date just after a multiple of 400 is quicker. For 3 March 2001, the 2,000 completed years give 0. January and February 2001 give 3, and the 3rd adds 3, so the total is 6 and the day is Saturday. The method was checked here against an independent day count on every one of the 73,049 dates from 1 January 1900 to 31 December 2099, and it gives the right weekday on all of them.

Or Look It Up: 1 January, 1950 to 2029

If arithmetic is not the point, start from the weekday of 1 January in the birth year and count forward. Find the decade in the left column and the last digit across the top; an asterisk marks a leap year. Then count the days from 1 January to the date, divide by seven and move the weekday on by the remainder. For 3 March 2001: 1 January 2001 is a Monday, the 3rd of March is 61 days later, 61 leaves 5 after the weeks, and 5 days on from Monday is Saturday, as before.

Two years with the same 1 January weekday and the same leap status share a whole calendar. The calendar of 2027 is the calendar of 1954, 1965, 1971, 1982, 1993, 1999, 2010 and 2021, so a birthday that fell on a Saturday in one of those years falls on a Saturday in 2027 as well.

The Hindu Day Begins at Sunrise

The panchang reads its day from one sunrise to the next. The vaar, the tithi, the nakshatra, the yoga and the karana printed for a date are the ones holding at that date’s sunrise; that is how the site’s daily panchang table is built. The weekday lords follow the same day: Sunday belongs to the Sun, Monday to the Moon, Tuesday to Mars, Wednesday to Mercury, Thursday to Jupiter, Friday to Venus and Saturday to Saturn. The site’s hora tool applies the rule and its gulika page states it: because the day runs from sunrise to sunrise, a moment after midnight but before sunrise belongs to the previous weekday’s night, and the night horas and night gulika count for that moment are that weekday’s.

An example. A child born at 02:40 on Saturday, 9 January 2027, in New Delhi has Saturday on the birth certificate. Sunrise there that morning is at 07:15, so the birth comes in the night that began at Friday’s sunset, and the panchang vaar is Shukravar, Friday, whose lord is Venus. The same clock time can land on either side in different seasons. A birth at 05:40 on 9 January is before that day’s sunrise and takes Friday. A birth at 05:40 on Saturday, 12 June 2027, comes after a 05:22 sunrise and keeps Saturday.

The tithi and nakshatra need the same care, though they are not rolled back: for a small-hours birth they are read at the minute of birth, while the panchang page for that calendar date shows whatever held at its later sunrise. The birth tithi page works through such a birth and shows how the two can differ.

How Much of the Clock Day Sits Before Sunrise

The share depends on how late the Sun rises, and that depends on the city’s longitude against Indian Standard Time, its latitude and the season. The table gives, for each city, the share of all the minutes of 2027 that fall between midnight and sunrise, with the year’s earliest and latest sunrise. Cities run from the smallest share to the largest. Eleven of the fourteen are at a quarter or more. The eastern cities, where the Sun rises earliest on the clock, have the smallest share.

These are shares of clock time, not of births. The latest sunrise in the table is 07:33 at Jammu, on every day from 3 to 15 January, when a little over 31% of the clock day goes by before the panchang changes its vaar. The earliest is 04:30 at Guwahati, through the first eighteen days of June. Sunrise at Delhi is computed by the site’s city formula and also read from the DE421 table for New Delhi; the two agree on the 2027 share to within a twentieth of a percentage point.

In Delhi the stretch is longest in January and shortest in June. Over the year it swings by 113 minutes, nearly two hours, which is why a small-hours birth time needs the sunrise of that exact date, not a rule of thumb such as “before six”. The city panchang pages list every sunrise of 2026 and 2027 city by city; for a birth in another year, take the sunrise of that date and place from an almanac for that year.

What This Page Does Not Do

Books and lists that assign a temperament or a fortune to each weekday of birth are easy to find; this page leaves them out. It answers the calendar question only: which weekday a date falls on, and which vaar a birth time belongs to.

In Brief

• Civil weekday: changes at midnight; work it out with odd days or the 1 January table
• Panchang vaar: changes at sunrise; a birth between midnight and sunrise takes the previous day’s vaar
• How often: 22.1% (Guwahati) to 27.4% (Ahmedabad) of 2027’s clock time
• Example: 02:40 on 9 January 2027, Delhi: Saturday by the calendar, Shukravar by the panchang

Other weekday rules on the site run on the same vaar: rahu kaal and gulika on the daily panchang, and the dagdha tithi table. In Hindi: मेरा जन्म किस वार को हुआ.