Ruling · Yama Tarpaṇa · 2043

Monday 9 February

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 2 min 11 s away. Say “contested”.

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 8 February

Caturdaśī is absent from aruṇodaya. Not taken.

05:30 aruṇodaya beginssunrise 07:18
Caturdaśī begins 07:20:28
05:0605:3005:5406:1806:4207:0607:30

0 of 108 minutes covered

Dawn of Monday 9 February

Taken. The only dawn Caturdaśī reaches.

05:29 aruṇodaya beginssunrise 07:17
Caturdaśī ends 06:30:13
05:0505:2905:5306:1706:4107:0507:29

61 of 108 minutes covered, the first 61

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

How it was decided

  1. 01

    Aṅga

    Caturdaśī runs from 07:20 on Sun 8 Feb to 06:30 on Mon 9 Feb.

    2043-02-07T23:20:29Z → 2043-02-08T22:30:13Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 05:30–07:18 on the 8th, 05:29–07:17 on the 9th.

    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 108 minutes on the 8th and 61 of 108 on the 9th.

    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 131 s < 300 s

  5. 05

    Ruling

    Yama Tarpaṇa, Baoding, 2043: Monday 9 February.

    confidence: boundary (margin)

Say it like this

In Baoding, Yama Tarpaṇa 2043 falls on Monday 9 February. Caturdaśī runs from 07:20 on Sun 8 Feb to 06:30 on Mon 9 Feb and covers 61 of 108 minutes of aruṇodaya that dawn. It is 2 min 11 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/2043/yama-tarpana · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 9 Feb
Ahargaṇa, classicalDisc centre, no refractionMon 9 Feb
compat-drikpanchangComparison profileMon 9 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 7thCoveredAruṇodaya 8thCoveredRuled
Los Angeles15:20 → 14:3004:590 min04:59106 min8 Feb
Chicago17:20 → 16:3005:070 min05:06110 min8 Feb
Jersey City18:20 → 17:3005:110 min05:10109 min8 Feb
Port of Spain19:20 → 18:3004:500 min04:5098 min8 Feb
London23:20 → 22:3005:330 min05:32116 min8 Feb
Durban01:20 → 00:3004:050 min04:0585 min8 Feb
Dubai03:20 → 02:3005:160 min05:15103 min8 Feb
Delhi04:50 → 04:0005:220 min05:21104 min8 Feb
Kolkata04:50 → 04:0004:310 min04:3182 min8 Feb
Singapore07:20 → 06:3005:410 min05:410 min9 Feb
Sydney10:20 → 09:3004:590 min05:000 min9 Feb
Suva11:20 → 10:3004:270 min04:270 min9 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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