Ruling · Yama Tarpaṇa · 1927

Tuesday 1 February

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 450 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 Tuesday 1 February

Taken. The only dawn Caturdaśī reaches.

05:35 aruṇodaya beginssunrise 07:26
05:1105:3505:5906:2306:4707:1107:3507:59

111 of 111 minutes covered

Dawn of Wednesday 2 February

Caturdaśī is absent from aruṇodaya. Not taken.

05:35 aruṇodaya beginssunrise 07:25
05:1105:3505:5906:2306:4707:1107:3507:59

0 of 110 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 22:06 on Mon 31 Jan to 19:45 on Tue 1 Feb.

    1927-01-31T14:05:35Z → 1927-02-01T11:44:38Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 05:35–07:26 on the 1st, 05:35–07:25 on the 2nd.

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

  3. 03

    Rule

    Caturdaśī must be present during aruṇodaya. It covers 111 of 111 minutes on the 1st and 0 of 110 on the 2nd.

    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 26993 s

  5. 05

    Ruling

    Yama Tarpaṇa, Baoding, 1927: Tuesday 1 February.

    confidence: determinate

Say it like this

In Baoding, Yama Tarpaṇa 1927 falls on Tuesday 1 February. Caturdaśī runs from 22:06 on Mon 31 Jan to 19:45 on Tue 1 Feb and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/1927/yama-tarpana · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 1 Feb
Ahargaṇa, classicalDisc centre, no refractionTue 1 Feb
compat-drikpanchangComparison profileTue 1 Feb
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 31stCoveredAruṇodaya 1stCoveredRuled
Los Angeles06:06 → 03:4505:0446 min05:030 min31 Jan
Chicago08:06 → 05:4505:130 min05:1232 min1 Feb
Jersey City09:06 → 06:4505:170 min05:1688 min1 Feb
Port of Spain10:06 → 07:4504:510 min04:5199 min1 Feb
London14:06 → 11:4505:430 min05:42119 min1 Feb
Durban16:06 → 13:4504:000 min04:0084 min1 Feb
Dubai18:06 → 15:4505:190 min05:18104 min1 Feb
Delhi19:36 → 17:1505:250 min05:25106 min1 Feb
Kolkata19:36 → 17:1504:340 min04:33103 min1 Feb
Singapore21:06 → 18:4504:410 min04:4196 min1 Feb
Sydney00:06 → 21:4503:530 min03:5482 min1 Feb
Suva02:06 → 23:4504:230 min04:2489 min1 Feb
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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