Ruling · Yama Tarpaṇa · 2097

Monday 11 February

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 426 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 Sunday 10 February

Caturdaśī is absent from aruṇodaya. Not taken.

05:28 aruṇodaya beginssunrise 07:15
05:0405:2805:5206:1606:4007:0407:28

0 of 107 minutes covered

Dawn of Monday 11 February

Taken. The only dawn Caturdaśī reaches.

05:27 aruṇodaya beginssunrise 07:14
05:0305:2705:5106:1506:3907:0307:27

107 of 107 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 14:22 on Sun 10 Feb to 15:22 on Mon 11 Feb.

    2097-02-10T06:21:45Z → 2097-02-11T07:22:27Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 05:28–07:15 on the 10th, 05:27–07:14 on the 11th.

    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 107 minutes on the 10th and 107 of 107 on the 11th.

    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 25586 s

  5. 05

    Ruling

    Yama Tarpaṇa, Baoding, 2097: Monday 11 February.

    confidence: determinate

Say it like this

In Baoding, Yama Tarpaṇa 2097 falls on Monday 11 February. Caturdaśī runs from 14:22 on Sun 10 Feb to 15:22 on Mon 11 Feb and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/2097/yama-tarpana · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 11 Feb
Ahargaṇa, classicalDisc centre, no refractionMon 11 Feb
compat-drikpanchangComparison profileMon 11 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 10thCoveredAruṇodaya 11thCoveredRuled
Los Angeles22:22 → 23:2204:57105 min04:560 min10 Feb
Chicago00:22 → 01:2205:03109 min05:030 min10 Feb
Jersey City01:22 → 02:2205:08108 min05:070 min10 Feb
Port of Spain02:22 → 03:2204:5098 min04:500 min10 Feb
London06:22 → 07:2205:2961 min05:27114 min11 Feb
Durban08:22 → 09:2204:070 min04:0886 min11 Feb
Dubai10:22 → 11:2205:140 min05:14102 min11 Feb
Delhi11:52 → 12:5205:200 min05:19103 min11 Feb
Kolkata11:52 → 12:5204:300 min04:30101 min11 Feb
Singapore14:22 → 15:2205:420 min05:4295 min11 Feb
Sydney17:22 → 18:2205:020 min05:0385 min11 Feb
Suva18:22 → 19:2204:280 min04:2990 min11 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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