Ruling · Yama Tarpaṇa · 2009

Sunday 25 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 217 minutes.

Decide it for

BaodingDelhiKolkataSingaporeSydneyJersey City

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 24 January

Caturdaśī is absent from aruṇodaya. Not taken.

05:39 aruṇodaya beginssunrise 07:31
05:1505:3906:0306:2706:5107:1507:3908:03

0 of 112 minutes covered

Dawn of Sunday 25 January

Taken. The only dawn Caturdaśī reaches.

05:38 aruṇodaya beginssunrise 07:30
05:1405:3806:0206:2606:5007:1407:3808:02

112 of 112 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 11:08 on Sat 24 Jan to 13:39 on Sun 25 Jan.

    2009-01-24T03:08:07Z → 2009-01-25T05:39:18Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 05:39–07:31 on the 24th, 05:38–07:30 on the 25th.

    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 24th and 112 of 112 on the 25th.

    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 13023 s

  5. 05

    Ruling

    Yama Tarpaṇa, Baoding, 2009: Sunday 25 January.

    confidence: determinate

Say it like this

In Baoding, Yama Tarpaṇa 2009 falls on Sunday 25 January. Caturdaśī runs from 11:08 on Sat 24 Jan to 13:39 on Sun 25 Jan and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/2009/yama-tarpana · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 25 Jan
Ahargaṇa, classicalDisc centre, no refractionSun 25 Jan
compat-drikpanchangComparison profileSun 25 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 24thCoveredAruṇodaya 25thCoveredRuled
Los Angeles19:08 → 21:3905:06109 min05:050 min24 Jan
Chicago21:08 → 23:3905:16114 min05:160 min24 Jan
Jersey City22:08 → 00:3905:20113 min05:190 min24 Jan
Port of Spain23:08 → 01:3904:5199 min04:510 min24 Jan
London03:08 → 05:3905:48122 min05:470 min24 Jan
Durban05:08 → 07:3903:5510 min03:5683 min25 Jan
Dubai07:08 → 09:3905:200 min05:19105 min25 Jan
Delhi08:38 → 11:0905:260 min05:26107 min25 Jan
Kolkata08:38 → 11:0904:340 min04:34104 min25 Jan
Singapore11:08 → 13:3905:390 min05:4096 min25 Jan
Sydney14:08 → 16:3904:480 min04:4981 min25 Jan
Suva15:08 → 17:3904:200 min04:2188 min25 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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