Ruling · Yama Tarpaṇa · 1901

Saturday 19 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 300 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 Saturday 19 January

Taken. The only dawn Caturdaśī reaches.

05:41 aruṇodaya beginssunrise 07:35
05:1705:4106:0506:2906:5307:1707:4108:05

114 of 114 minutes covered

Dawn of Sunday 20 January

Caturdaśī is absent from aruṇodaya. Not taken.

05:41 aruṇodaya beginssunrise 07:34
05:1705:4106:0506:2906:5307:1707:4108:05

0 of 113 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 00:41 on Sat 19 Jan to 23:57 on Sat 19 Jan.

    1901-01-18T16:40:38Z → 1901-01-19T15:56:46Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 05:41–07:35 on the 19th, 05:41–07:34 on the 20th.

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

  3. 03

    Rule

    Caturdaśī must be present during aruṇodaya. It covers 114 of 114 minutes on the 19th and 0 of 113 on the 20th.

    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 18020 s

  5. 05

    Ruling

    Yama Tarpaṇa, Baoding, 1901: Saturday 19 January.

    confidence: determinate

Say it like this

In Baoding, Yama Tarpaṇa 1901 falls on Saturday 19 January. Caturdaśī runs from 00:41 on Sat 19 Jan to 23:57 on Sat 19 Jan and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/1901/yama-tarpana · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 19 Jan
Ahargaṇa, classicalDisc centre, no refractionSat 19 Jan
compat-drikpanchangComparison profileSat 19 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 18thCoveredAruṇodaya 19thCoveredRuled
Los Angeles08:41 → 07:5705:080 min05:07110 min19 Jan
Chicago10:41 → 09:5705:190 min05:19116 min19 Jan
Jersey City11:41 → 10:5705:230 min05:22115 min19 Jan
Port of Spain12:41 → 11:5704:500 min04:5099 min19 Jan
London16:41 → 15:5705:530 min05:53124 min19 Jan
Durban18:11 → 17:2703:210 min03:2182 min19 Jan
Dubai20:22 → 19:3805:010 min05:01106 min19 Jan
Delhi22:02 → 21:1805:180 min05:18108 min19 Jan
Kolkata22:02 → 21:1804:260 min04:26105 min19 Jan
Singapore23:36 → 22:5204:330 min04:3396 min19 Jan
Sydney02:41 → 01:5703:430 min03:4479 min19 Jan
Suva04:36 → 03:5204:120 min04:1364 min19 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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