Ruling · Yama Tarpaṇa · 1907

Sunday 13 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 530 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 Sunday 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 Monday 14 January

Caturdaśī is absent from aruṇodaya. Not taken.

05:42 aruṇodaya beginssunrise 07:37
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 20:52 on Sat 12 Jan to 17:22 on Sun 13 Jan.

    1907-01-12T12:52:18Z → 1907-01-13T09:22:25Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 05:42–07:37 on the 13th, 05:42–07:37 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 31781 s

  5. 05

    Ruling

    Yama Tarpaṇa, Baoding, 1907: Sunday 13 January.

    confidence: determinate

Say it like this

In Baoding, Yama Tarpaṇa 1907 falls on Sunday 13 January. Caturdaśī runs from 20:52 on Sat 12 Jan to 17:22 on Sun 13 Jan and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/1907/yama-tarpana · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 13 Jan
Ahargaṇa, classicalDisc centre, no refractionSun 13 Jan
compat-drikpanchangComparison profileSun 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 Angeles04:52 → 01:2205:08112 min05:080 min12 Jan
Chicago06:52 → 03:2205:2126 min05:210 min12 Jan
Jersey City07:52 → 04:2205:240 min05:240 min12 Jan
Port of Spain08:52 → 05:2204:480 min04:4934 min13 Jan
London12:52 → 09:2205:570 min05:56126 min13 Jan
Durban14:52 → 11:2203:460 min03:4781 min13 Jan
Dubai16:33 → 13:0305:010 min05:01106 min13 Jan
Delhi18:22 → 14:5205:270 min05:27108 min13 Jan
Kolkata18:22 → 14:5204:340 min04:34105 min13 Jan
Singapore19:52 → 16:2204:360 min04:3696 min13 Jan
Sydney22:52 → 19:2203:380 min03:3978 min13 Jan
Suva00:47 → 21:1704:080 min04:0987 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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