Ruling · Yama Tarpaṇa · 1920

Tuesday 20 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 144 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 Monday 19 January

Caturdaśī is absent from aruṇodaya. Not taken.

05:41 aruṇodaya beginssunrise 07:35
05:1705:4106:0506:2906:5307:1707:4108:05

0 of 114 minutes covered

Dawn of Tuesday 20 January

Taken. The only dawn Caturdaśī reaches.

05:41 aruṇodaya beginssunrise 07:34
05:1705:4106:0506:2906:5307:1707:4108:05

114 of 114 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 09:58 on Mon 19 Jan to 11:56 on Tue 20 Jan.

    1920-01-19T01:58:28Z → 1920-01-20T03:56:16Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 05:41–07:35 on the 19th, 05:41–07:34 on the 20th.

    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 114 minutes on the 19th and 114 of 114 on the 20th.

    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 8620 s

  5. 05

    Ruling

    Yama Tarpaṇa, Baoding, 1920: Tuesday 20 January.

    confidence: determinate

Say it like this

In Baoding, Yama Tarpaṇa 1920 falls on Tuesday 20 January. Caturdaśī runs from 09:58 on Mon 19 Jan to 11:56 on Tue 20 Jan and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/1920/yama-tarpana · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 20 Jan
Ahargaṇa, classicalDisc centre, no refractionTue 20 Jan
compat-drikpanchangComparison profileTue 20 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 19thCoveredAruṇodaya 20thCoveredRuled
Los Angeles17:58 → 19:5605:07111 min05:070 min19 Jan
Chicago19:58 → 21:5605:19116 min05:190 min19 Jan
Jersey City20:58 → 22:5605:23115 min05:220 min19 Jan
Port of Spain21:58 → 23:5604:5099 min04:500 min19 Jan
London01:58 → 03:5605:53125 min05:520 min19 Jan
Durban03:58 → 05:5603:5174 min03:5282 min20 Jan
Dubai05:58 → 07:5605:2068 min05:20106 min20 Jan
Delhi07:28 → 09:2605:270 min05:27108 min20 Jan
Kolkata07:28 → 09:2604:350 min04:35105 min20 Jan
Singapore08:58 → 10:5604:380 min04:3896 min20 Jan
Sydney11:58 → 13:5603:430 min03:4479 min20 Jan
Suva13:58 → 15:5604:170 min04:1888 min20 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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