Ruling · Yama Tarpaṇa · 1985

Sunday 20 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 190 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 Saturday 19 January

Caturdaśī is absent from aruṇodaya. Not taken.

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

0 of 113 minutes covered

Dawn of Sunday 20 January

Taken. The only dawn Caturdaśī reaches.

05:40 aruṇodaya beginssunrise 07:34
05:1605:4006:0406:2806:5207:1607:4008:04

113 of 113 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 11:23 on Sat 19 Jan to 10:44 on Sun 20 Jan.

    1985-01-19T03:23:04Z → 1985-01-20T02:43:57Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 05:41–07:34 on the 19th, 05:40–07:34 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 113 minutes on the 19th and 113 of 113 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 11422 s

  5. 05

    Ruling

    Yama Tarpaṇa, Baoding, 1985: Sunday 20 January.

    confidence: determinate

Say it like this

In Baoding, Yama Tarpaṇa 1985 falls on Sunday 20 January. Caturdaśī runs from 11:23 on Sat 19 Jan to 10:44 on Sun 20 Jan and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/1985/yama-tarpana · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 20 Jan
Ahargaṇa, classicalDisc centre, no refractionSun 20 Jan
compat-drikpanchangComparison profileSun 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 Angeles19:23 → 18:4405:07110 min05:070 min19 Jan
Chicago21:23 → 20:4405:19115 min05:180 min19 Jan
Jersey City22:23 → 21:4405:22115 min05:220 min19 Jan
Port of Spain23:23 → 22:4404:5099 min04:500 min19 Jan
London03:23 → 02:4405:52124 min05:510 min19 Jan
Durban05:23 → 04:4403:520 min03:5252 min20 Jan
Dubai07:23 → 06:4405:200 min05:2084 min20 Jan
Delhi08:53 → 08:1405:270 min05:27107 min20 Jan
Kolkata08:53 → 08:1404:350 min04:35104 min20 Jan
Singapore11:23 → 10:4405:380 min05:3896 min20 Jan
Sydney14:23 → 13:4404:440 min04:4580 min20 Jan
Suva15:23 → 14:4404:180 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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