Ruling · Yama Tarpaṇa · 1980

Thursday 17 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 9 min 33 s.

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 Wednesday 16 January

Caturdaśī is absent from aruṇodaya. Not taken.

05:41 aruṇodaya beginssunrise 07:36
05:1705:4106:0506:2906:5307:1707:4108:05

0 of 114 minutes covered

Dawn of Thursday 17 January

Taken. The only dawn Caturdaśī reaches.

05:41 aruṇodaya beginssunrise 07:35
Caturdaśī ends 07:44:48
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 09:42 on Wed 16 Jan to 07:45 on Thu 17 Jan.

    1980-01-16T01:42:15Z → 1980-01-16T23:44:49Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 05:41–07:36 on the 16th, 05:41–07:35 on the 17th.

    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 16th and 114 of 114 on the 17th.

    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 573 s

  5. 05

    Ruling

    Yama Tarpaṇa, Baoding, 1980: Thursday 17 January.

    confidence: determinate

Say it like this

In Baoding, Yama Tarpaṇa 1980 falls on Thursday 17 January. Caturdaśī runs from 09:42 on Wed 16 Jan to 07:45 on Thu 17 Jan and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/1980/yama-tarpana · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 17 Jan
Ahargaṇa, classicalDisc centre, no refractionThu 17 Jan
compat-drikpanchangComparison profileThu 17 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 16thCoveredAruṇodaya 17thCoveredRuled
Los Angeles17:42 → 15:4505:08111 min05:070 min16 Jan
Chicago19:42 → 17:4505:20116 min05:190 min16 Jan
Jersey City20:42 → 18:4505:23115 min05:230 min16 Jan
Port of Spain21:42 → 19:4504:49100 min04:490 min16 Jan
London01:42 → 23:4505:54125 min05:540 min16 Jan
Durban03:42 → 01:4503:4981 min03:500 min16 Jan
Dubai05:42 → 03:4505:2084 min05:200 min16 Jan
Delhi07:12 → 05:1505:273 min05:270 min16 Jan
Kolkata07:12 → 05:1504:340 min04:3440 min17 Jan
Singapore09:12 → 07:1505:070 min05:0796 min17 Jan
Sydney12:42 → 10:4504:410 min04:4279 min17 Jan
Suva13:42 → 11:4504:160 min04:1687 min17 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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