How it works

How Vettri works out your day.

The same panchangam Tamil families have used for generations, worked out for your town and explained in plain words.

Four steps, every day

  1. 1

    Your town

    Sunrise and sunset differ from town to town, so every calculation starts there.

  2. 2

    The Sun and Moon

    Where the Sun and Moon are that day, from a real astronomical calculation.

  3. 3

    The five limbs

    From them come the tithi, vara, nakshatra, yoga and karana.

  4. 4

    Plain words

    We turn that into good times and times to avoid, in plain language.

The five limbs of the day

These are today’s values for Colombo, Thursday, 15 October 2026. They change every day.

  • TithiShukla Panchami

    The angle between the Moon and the Sun

  • VaraThursday

    The day of the week

  • NakshatraKettai

    The star the Moon is in

  • YogaSaubhagya

    The Sun and Moon’s angles added together

  • Karana—

    Half a tithi

How Rahu Kalam is worked out

Split the day from sunrise to sunset into eight equal parts. Which part is Rahu Kalam depends on the weekday.

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8

Sunrise 6:00 amSunset 5:52 pm

Thursday: Part 6 · 1:25 pm – 2:54 pm

DayRahu Kalam part
Sunday8
Monday2
Tuesday7
Wednesday5
Thursday6
Friday4
Saturday3

Thirukanitham or Vakyam?

Vettri

Thirukanitham

Works out the Sun and Moon from real astronomical calculation. Vettri is built on this.

Vakyam

An older, table-based method still used in some family panchangams. On some days the tithi and star times can differ from Thirukanitham.

If your family’s panchangam is Vakyam, a few times may differ a little. When in doubt, your family panchangam has the last word.

How we check

Real astronomical calculation

Every time is worked out from where the Sun and Moon actually are, not copied from a memorised table.

Tell us if it looks wrong

If a time looks off to you, write to us and we will check it.

What Vettri won’t do

  • No fear

    We help you approach the day with confidence, not frighten you.

  • No paid remedies

    We do not sell remedies.

  • No medical or legal advice

    For health, law or money decisions, ask a qualified person.

  • No selling your data

    We do not sell your information.

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