Ruling · Yama Tarpaṇa · 1923

Tuesday 16 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 208 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 Monday 15 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 114 minutes covered

Dawn of Tuesday 16 January

Taken. The only dawn Caturdaśī reaches.

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

114 of 114 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 11:55 on Mon 15 Jan to 11:04 on Tue 16 Jan.

    1923-01-15T03:54:53Z → 1923-01-16T03:04:14Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 05:42–07:36 on the 15th, 05:42–07:36 on the 16th.

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

  3. 03

    Rule

    Caturdaśī must be present during aruṇodaya. It covers 0 of 114 minutes on the 15th and 114 of 114 on the 16th.

    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 12502 s

  5. 05

    Ruling

    Yama Tarpaṇa, Baoding, 1923: Tuesday 16 January.

    confidence: determinate

Say it like this

In Baoding, Yama Tarpaṇa 1923 falls on Tuesday 16 January. Caturdaśī runs from 11:55 on Mon 15 Jan to 11:04 on Tue 16 Jan and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/1923/yama-tarpana · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 16 Jan
Ahargaṇa, classicalDisc centre, no refractionTue 16 Jan
compat-drikpanchangComparison profileTue 16 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 15thCoveredAruṇodaya 16thCoveredRuled
Los Angeles19:55 → 19:0405:08111 min05:080 min15 Jan
Chicago21:55 → 21:0405:20117 min05:200 min15 Jan
Jersey City22:55 → 22:0405:23116 min05:230 min15 Jan
Port of Spain23:55 → 23:0404:49100 min04:490 min15 Jan
London03:55 → 03:0405:55126 min05:550 min15 Jan
Durban05:55 → 05:0403:480 min03:4975 min16 Jan
Dubai07:55 → 07:0405:200 min05:20104 min16 Jan
Delhi09:25 → 08:3405:270 min05:27108 min16 Jan
Kolkata09:25 → 08:3404:340 min04:34105 min16 Jan
Singapore10:55 → 10:0404:370 min04:3796 min16 Jan
Sydney13:55 → 13:0403:400 min03:4179 min16 Jan
Suva15:55 → 15:0404:150 min04:1687 min16 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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