Ruling · Yama Tarpaṇa · 2020

Thursday 23 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 51 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 Thursday 23 January

Taken. The only dawn Caturdaśī reaches.

05:39 aruṇodaya beginssunrise 07:32
05:1505:3906:0306:2706:5107:1507:3908:03

113 of 113 minutes covered

Dawn of Friday 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

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

How it was decided

  1. 01

    Aṅga

    Caturdaśī runs from 04:19 on Thu 23 Jan to 04:48 on Fri 24 Jan.

    2020-01-22T20:19:05Z → 2020-01-23T20:47:51Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 05:39–07:32 on the 23rd, 05:39–07:31 on the 24th.

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

  3. 03

    Rule

    Caturdaśī must be present during aruṇodaya. It covers 113 of 113 minutes on the 23rd and 0 of 112 on the 24th.

    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 3068 s

  5. 05

    Ruling

    Yama Tarpaṇa, Baoding, 2020: Thursday 23 January.

    confidence: determinate

Say it like this

In Baoding, Yama Tarpaṇa 2020 falls on Thursday 23 January. Caturdaśī runs from 04:19 on Thu 23 Jan to 04:48 on Fri 24 Jan and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/2020/yama-tarpana · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 23 Jan
Ahargaṇa, classicalDisc centre, no refractionThu 23 Jan
compat-drikpanchangComparison profileThu 23 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 22ndCoveredAruṇodaya 23rdCoveredRuled
Los Angeles12:19 → 12:4805:060 min05:06110 min23 Jan
Chicago14:19 → 14:4805:170 min05:17115 min23 Jan
Jersey City15:19 → 15:4805:210 min05:21114 min23 Jan
Port of Spain16:19 → 16:4804:500 min04:5099 min23 Jan
London20:19 → 20:4805:500 min05:49123 min23 Jan
Durban22:19 → 22:4803:530 min03:5482 min23 Jan
Dubai00:19 → 00:4805:200 min05:20105 min23 Jan
Delhi01:49 → 02:1805:270 min05:27107 min23 Jan
Kolkata01:49 → 02:1804:340 min04:34104 min23 Jan
Singapore04:19 → 04:4805:390 min05:3996 min23 Jan
Sydney07:19 → 07:4804:460 min04:470 min24 Jan
Suva08:19 → 08:4804:190 min04:190 min24 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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