Ruling · Yama Dīpadāna · 1921

Friday 28 October

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 157 minutes.

Decide it for

DaqingDelhiKolkataSingaporeSydneyJersey City

46°35′ N 125°00′ E · Asia/Shanghai · GeoNames 2037860

The two evenings

One ghaṭī is 24 minutes. Pradoṣa is 2 muhūrtas after sunset.

Evening of Friday 28 October

Taken. The only evening Trayodaśī reaches.

16:32 sunsetpradoṣa ends 18:22
16:0816:3216:5617:2017:4418:0818:3218:56

110 of 110 minutes covered

Evening of Saturday 29 October

Trayodaśī is absent from pradoṣa. Not taken.

16:31 sunsetpradoṣa ends 18:21
16:0716:3116:5517:1917:4318:0718:3118:55

0 of 110 minutes covered

Trayodaśī presentPradoṣa, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Trayodaśī runs from 13:56 on Fri 28 Oct to 11:35 on Sat 29 Oct.

    1921-10-28T05:55:30Z → 1921-10-29T03:35:15Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 16:32–18:22 on the 28th, 16:31–18:21 on the 29th.

    pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Trayodaśī must be present during pradoṣa. It covers 110 of 110 minutes on the 28th and 0 of 110 on the 29th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104

  4. 04

    Tie-break

    Only one evening qualifies. No tie-break is needed.

    priority: unstated → only-day · margin 9407 s

  5. 05

    Ruling

    Yama Dīpadāna, Daqing, 1921: Friday 28 October.

    confidence: determinate

Say it like this

In Daqing, Yama Dīpadāna 1921 falls on Friday 28 October. Trayodaśī runs from 13:56 on Fri 28 Oct to 11:35 on Sat 29 Oct and covers all of pradoṣa that evening.

ahargana.org/daqing/festivals/1921/yama-dipadana · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 28 Oct
Ahargaṇa, classicalDisc centre, no refractionFri 28 Oct
compat-drikpanchangComparison profileFri 28 Oct
No institution has a recorded ruling for Daqing.

Institutional rulings are recorded with a source address, and are never edited to agree.

The rule, as data

/rules/yama-dipadana · ruleset 2026.3-draft

Month
Āśvina, amānta
Pakṣa · aṅga
Kṛṣṇa · Trayodaśī
Kāla
Pradoṣa
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 104

“K 13 Yama dipadana (pradosa).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceTrayodaśīSunset 28thCoveredSunset 29thCoveredRuled
Los Angeles21:56 → 19:3517:04105 min17:030 min28 Oct
Chicago00:56 → 22:3517:50108 min17:490 min28 Oct
Jersey City00:56 → 22:3516:58107 min16:570 min28 Oct
Port of Spain01:56 → 23:3517:4398 min17:430 min28 Oct
London05:56 → 03:3516:42113 min16:400 min28 Oct
Durban07:56 → 05:3518:1487 min18:150 min28 Oct
Dubai09:56 → 07:3517:41102 min17:410 min28 Oct
Delhi11:26 → 09:0517:40103 min17:390 min28 Oct
Kolkata11:26 → 09:0517:02101 min17:010 min28 Oct
Singapore12:56 → 10:3517:5195 min17:500 min28 Oct
Sydney15:56 → 13:3518:1985 min18:200 min28 Oct
Suva17:56 → 15:3518:1190 min18:110 min28 Oct
Profile · tradition
pac-rp@2026.1 · smarta
Rule
yama-dipadana@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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