Ruling · Yama Tarpaṇa · 1919

Friday 31 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 52 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 30 January

Caturdaśī is absent from aruṇodaya. Not taken.

05:37 aruṇodaya beginssunrise 07:28
05:1305:3706:0106:2506:4907:1307:3708:01

0 of 111 minutes covered

Dawn of Friday 31 January

Taken. The only dawn Caturdaśī reaches.

05:36 aruṇodaya beginssunrise 07:27
05:1205:3606:0006:2406:4807:1207:3608:00

111 of 111 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 08:54 on Thu 30 Jan to 08:19 on Fri 31 Jan.

    1919-01-30T00:54:29Z → 1919-01-31T00:19:11Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 05:37–07:28 on the 30th, 05:36–07:27 on the 31st.

    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 111 minutes on the 30th and 111 of 111 on the 31st.

    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 3133 s

  5. 05

    Ruling

    Yama Tarpaṇa, Baoding, 1919: Friday 31 January.

    confidence: determinate

Say it like this

In Baoding, Yama Tarpaṇa 1919 falls on Friday 31 January. Caturdaśī runs from 08:54 on Thu 30 Jan to 08:19 on Fri 31 Jan and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/1919/yama-tarpana · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 31 Jan
Ahargaṇa, classicalDisc centre, no refractionFri 31 Jan
compat-drikpanchangComparison profileFri 31 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 30thCoveredAruṇodaya 31stCoveredRuled
Los Angeles16:54 → 16:1905:04108 min05:040 min30 Jan
Chicago18:54 → 18:1905:14113 min05:130 min30 Jan
Jersey City19:54 → 19:1905:17112 min05:170 min30 Jan
Port of Spain20:54 → 20:1904:5199 min04:510 min30 Jan
London00:54 → 00:1905:44120 min05:430 min30 Jan
Durban02:54 → 02:1903:5983 min04:000 min30 Jan
Dubai04:35 → 04:0005:00104 min05:000 min30 Jan
Delhi06:24 → 05:4905:2547 min05:2524 min30 Jan
Kolkata06:24 → 05:4904:340 min04:3476 min31 Jan
Singapore07:54 → 07:1904:410 min04:4196 min31 Jan
Sydney10:54 → 10:1903:520 min03:5382 min31 Jan
Suva12:54 → 12:1904:230 min04:2389 min31 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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