Ruling · Yama Tarpaṇa · 2025

Tuesday 28 January

Determinatein Ujjain, under the Rashtriya Panchang method. Clear of every threshold by 530 minutes.

Decide it for

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

The two dawns

One ghaṭī is 24 minutes. Aruṇodaya is 2 muhūrtas before sunrise.

Dawn of Tuesday 28 January

Taken. The only dawn Caturdaśī reaches.

05:25 aruṇodaya beginssunrise 07:08
05:0105:2505:4906:1306:3707:0107:25

104 of 104 minutes covered

Dawn of Wednesday 29 January

Caturdaśī is absent from aruṇodaya. Not taken.

05:25 aruṇodaya beginssunrise 07:08
05:0105:2505:4906:1306:3707:0107:25

0 of 104 minutes covered

Caturdaśī presentAruṇodaya, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Caturdaśī runs from 20:35 on Mon 27 Jan to 19:37 on Tue 28 Jan.

    2025-01-27T15:05:12Z → 2025-01-28T14:06:33Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 05:25–07:08 on the 28th, 05:25–07:08 on the 29th.

    arunodaya: prev-night-muhurta-14-15 · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Caturdaśī must be present during aruṇodaya. It covers 104 of 104 minutes on the 28th and 0 of 104 on the 29th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105

  4. 04

    Tie-break

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

    priority: unstated → only-day · margin 31775 s

  5. 05

    Ruling

    Yama Tarpaṇa, Ujjain, 2025: Tuesday 28 January.

    confidence: determinate

Say it like this

In Ujjain, Yama Tarpaṇa 2025 falls on Tuesday 28 January. Caturdaśī runs from 20:35 on Mon 27 Jan to 19:37 on Tue 28 Jan and covers all of aruṇodaya that dawn.

ahargana.org/ujjain/festivals/2025/yama-tarpana · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 28 Jan
Ahargaṇa, classicalDisc centre, no refractionTue 28 Jan
compat-drikpanchangComparison profileTue 28 Jan
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/yama-tarpana · ruleset 2026.3-draft

Month
Pauṣa, amānta
Pakṣa · aṅga
Kṛṣṇa · Caturdaśī
Kāla
Aruṇodaya
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 105

“K 14 Yama tarpana (covering a period of 4 ghatikas before sunrise)” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceCaturdaśīAruṇodaya 27thCoveredAruṇodaya 28thCoveredRuled
Los Angeles07:05 → 06:0705:050 min05:0462 min28 Jan
Chicago09:05 → 08:0705:140 min05:14113 min28 Jan
Jersey City10:05 → 09:0705:180 min05:18112 min28 Jan
Port of Spain11:05 → 10:0704:510 min04:5199 min28 Jan
London15:05 → 14:0705:450 min05:44121 min28 Jan
Durban17:05 → 16:0703:570 min03:5883 min28 Jan
Dubai19:05 → 18:0705:190 min05:19104 min28 Jan
Delhi20:35 → 19:3705:260 min05:25106 min28 Jan
Kolkata20:35 → 19:3704:340 min04:34103 min28 Jan
Singapore23:05 → 22:0705:400 min05:4096 min28 Jan
Sydney02:05 → 01:0704:510 min04:5281 min28 Jan
Suva03:05 → 02:0704:220 min04:2288 min28 Jan
Profile · tradition
pac-rp@2026.1 · smarta
Rule
yama-tarpana@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s