Ruling · Anaṅga Trayodaśī · 2025

Thursday 10 April

Determinatein Ujjain, under the Rashtriya Panchang method. Clear of every threshold by 603 minutes.

Decide it for

UjjainDelhiKolkataSingaporeSydneyJersey City

23°11′ N 75°47′ E · Asia/Kolkata · GeoNames 1253914

The two middays

One ghaṭī is 24 minutes. Madhyāhna is 1 ghaṭikā either side of midday.

Midday of Wednesday 9 April

Trayodaśī is absent from madhyāhna. Not taken.

madhyāhna begins 12:05  12:53 madhyāhna ends
11:1711:4112:0512:2912:5313:1713:41

0 of 48 minutes covered

Midday of Thursday 10 April

Taken. The only midday Trayodaśī reaches.

madhyāhna begins 12:04  12:52 madhyāhna ends
11:1611:4012:0412:2812:5213:1613:40

48 of 48 minutes covered

Trayodaśī presentMadhyāhna, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Trayodaśī runs from 22:56 on Wed 9 Apr to 01:01 on Fri 11 Apr.

    2025-04-09T17:26:00Z → 2025-04-10T19:31:11Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:05–12:53 on the 9th, 12:04–12:52 on the 10th.

    madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Trayodaśī must be present during madhyāhna. It covers 0 of 48 minutes on the 9th and 48 of 48 on the 10th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102

  4. 04

    Tie-break

    Only one midday qualifies. No tie-break is needed.

    priority: purvaviddha → only-day · margin 36203 s

  5. 05

    Ruling

    Anaṅga Trayodaśī, Ujjain, 2025: Thursday 10 April.

    confidence: determinate

Say it like this

In Ujjain, Anaṅga Trayodaśī 2025 falls on Thursday 10 April. Trayodaśī runs from 22:56 on Wed 9 Apr to 01:01 on Fri 11 Apr and covers all of madhyāhna that midday.

ahargana.org/ujjain/festivals/2025/ananga-trayodashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 10 Apr
Ahargaṇa, classicalDisc centre, no refractionThu 10 Apr
compat-drikpanchangComparison profileThu 10 Apr
No institution has a recorded ruling for Ujjain.

Institutional rulings are recorded with a source address, and are never edited to agree.

The rule, as data

/rules/ananga-trayodashi · ruleset 2026.3-draft

Month
Caitra, amānta
Pakṣa · aṅga
Śukla · Trayodaśī
Kāla
Madhyāhna
Priority
Pūrvaviddhā
Tie-break
First day
Reference
CRC 1955, p. 102

“S 13 Ananga trayodasi (purvaviddha), Mahavira jayanti (Jain).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceTrayodaśīMadhyāhna 9thCoveredMadhyāhna 10thCoveredRuled
Los Angeles10:26 → 12:3112:3148 min12:301 min9 Apr
Chicago12:26 → 14:3112:2848 min12:2848 min9 Apr
Jersey City13:26 → 15:3112:340 min12:3448 min10 Apr
Port of Spain13:26 → 15:3111:440 min11:4348 min10 Apr
London18:26 → 20:3112:390 min12:3848 min10 Apr
Durban19:26 → 21:3111:330 min11:3348 min10 Apr
Dubai21:26 → 23:3111:560 min11:5648 min10 Apr
Delhi22:56 → 01:0111:590 min11:5948 min10 Apr
Kolkata22:56 → 01:0111:140 min11:1448 min10 Apr
Singapore01:26 → 03:3112:420 min12:4248 min10 Apr
Sydney03:26 → 05:3111:330 min11:3248 min10 Apr
Suva05:26 → 07:3111:440 min11:4448 min10 Apr
Profile · tradition
pac-rp@2026.1 · smarta
Rule
ananga-trayodashi@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s