Ruling · Yama Tarpaṇa · 1911

Sunday 29 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 493 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 28 January

Caturdaśī is absent from aruṇodaya. Not taken.

05:38 aruṇodaya beginssunrise 07:29
05:1405:3806:0206:2606:5007:1407:3808:02

0 of 112 minutes covered

Dawn of Sunday 29 January

Taken. The only dawn Caturdaśī reaches.

05:37 aruṇodaya beginssunrise 07:29
05:1305:3706:0106:2506:4907:1307:3708:01

111 of 111 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 15:42 on Sat 28 Jan to 16:59 on Sun 29 Jan.

    1911-01-28T07:41:54Z → 1911-01-29T08:59:10Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 05:38–07:29 on the 28th, 05:37–07:29 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 0 of 112 minutes on the 28th and 111 of 111 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 29550 s

  5. 05

    Ruling

    Yama Tarpaṇa, Baoding, 1911: Sunday 29 January.

    confidence: determinate

Say it like this

In Baoding, Yama Tarpaṇa 1911 falls on Sunday 29 January. Caturdaśī runs from 15:42 on Sat 28 Jan to 16:59 on Sun 29 Jan and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/1911/yama-tarpana · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 29 Jan
Ahargaṇa, classicalDisc centre, no refractionSun 29 Jan
compat-drikpanchangComparison profileSun 29 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 28thCoveredAruṇodaya 29thCoveredRuled
Los Angeles23:42 → 00:5905:05109 min05:050 min28 Jan
Chicago01:42 → 02:5905:15113 min05:140 min28 Jan
Jersey City02:42 → 03:5905:19113 min05:180 min28 Jan
Port of Spain03:42 → 04:5904:5199 min04:518 min28 Jan
London07:42 → 08:5905:465 min05:45121 min29 Jan
Durban09:42 → 10:5903:570 min03:5883 min29 Jan
Dubai11:23 → 12:4005:000 min05:00105 min29 Jan
Delhi13:12 → 14:2905:260 min05:26106 min29 Jan
Kolkata13:12 → 14:2904:340 min04:34104 min29 Jan
Singapore14:42 → 15:5904:400 min04:4096 min29 Jan
Sydney17:42 → 18:5903:510 min03:5281 min29 Jan
Suva19:37 → 20:5404:170 min04:1788 min29 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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