Ruling · Yama Tarpaṇa · 1926

Wednesday 13 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 508 minutes.

Decide it for

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two dawns

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

Dawn of Wednesday 13 January

Taken. The only dawn Caturdaśī reaches.

05:42 aruṇodaya beginssunrise 07:37
05:1805:4206:0606:3006:5407:1807:4208:06

115 of 115 minutes covered

Dawn of Thursday 14 January

Caturdaśī is absent from aruṇodaya. Not taken.

05:42 aruṇodaya beginssunrise 07:36
05:1805:4206:0606:3006:5407:1807:4208:06

0 of 115 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 21:14 on Tue 12 Jan to 18:04 on Wed 13 Jan.

    1926-01-12T13:14:16Z → 1926-01-13T10:03:33Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 05:42–07:37 on the 13th, 05:42–07:36 on the 14th.

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

  3. 03

    Rule

    Caturdaśī must be present during aruṇodaya. It covers 115 of 115 minutes on the 13th and 0 of 115 on the 14th.

    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 30458 s

  5. 05

    Ruling

    Yama Tarpaṇa, Baoding, 1926: Wednesday 13 January.

    confidence: determinate

Say it like this

In Baoding, Yama Tarpaṇa 1926 falls on Wednesday 13 January. Caturdaśī runs from 21:14 on Tue 12 Jan to 18:04 on Wed 13 Jan and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/1926/yama-tarpana · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 13 Jan
Ahargaṇa, classicalDisc centre, no refractionWed 13 Jan
compat-drikpanchangComparison profileWed 13 Jan
No institution has a recorded ruling for Baoding.

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 12thCoveredAruṇodaya 13thCoveredRuled
Los Angeles05:14 → 02:0405:08105 min05:080 min12 Jan
Chicago07:14 → 04:0405:213 min05:200 min12 Jan
Jersey City08:14 → 05:0405:240 min05:240 min12 Jan
Port of Spain09:14 → 06:0404:480 min04:4975 min13 Jan
London13:14 → 10:0405:560 min05:56126 min13 Jan
Durban15:14 → 12:0403:460 min03:4781 min13 Jan
Dubai17:14 → 14:0405:200 min05:20106 min13 Jan
Delhi18:44 → 15:3405:270 min05:27108 min13 Jan
Kolkata18:44 → 15:3404:340 min04:34105 min13 Jan
Singapore20:14 → 17:0404:360 min04:3696 min13 Jan
Sydney23:14 → 20:0403:380 min03:3978 min13 Jan
Suva01:14 → 22:0404:130 min04:1487 min13 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

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