Ruling · Yama Tarpaṇa · 2066

Monday 25 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 32 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 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 Monday 25 January

Taken. The only dawn Caturdaśī reaches.

05:38 aruṇodaya beginssunrise 07:30
Caturdaśī ends 06:58:25
05:1405:3806:0206:2606:5007:1407:3808:02

80 of 112 minutes covered, the first 80

Caturdaśī presentAruṇodaya, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Caturdaśī runs from 09:53 on Sun 24 Jan to 06:58 on Mon 25 Jan.

    2066-01-24T01:53:16Z → 2066-01-24T22:58:25Z

  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 80 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 1911 s

  5. 05

    Ruling

    Yama Tarpaṇa, Baoding, 2066: Monday 25 January.

    confidence: determinate

Say it like this

In Baoding, Yama Tarpaṇa 2066 falls on Monday 25 January. Caturdaśī runs from 09:53 on Sun 24 Jan to 06:58 on Mon 25 Jan and covers 80 of 112 minutes of aruṇodaya that dawn.

ahargana.org/baoding/festivals/2066/yama-tarpana · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 25 Jan
Ahargaṇa, classicalDisc centre, no refractionMon 25 Jan
compat-drikpanchangComparison profileMon 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 Angeles17:53 → 14:5805:06109 min05:050 min24 Jan
Chicago19:53 → 16:5805:16114 min05:160 min24 Jan
Jersey City20:53 → 17:5805:20113 min05:190 min24 Jan
Port of Spain21:53 → 18:5804:5199 min04:510 min24 Jan
London01:53 → 22:5805:48122 min05:470 min24 Jan
Durban03:53 → 00:5803:5583 min03:560 min24 Jan
Dubai05:53 → 02:5805:2071 min05:190 min24 Jan
Delhi07:23 → 04:2805:260 min05:260 min24 Jan
Kolkata07:23 → 04:2804:340 min04:340 min24 Jan
Singapore09:53 → 06:5805:400 min05:4079 min25 Jan
Sydney12:53 → 09:5804:480 min04:4981 min25 Jan
Suva13:53 → 10:5804:200 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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