Ruling · Yama Dīpadāna · 2009

Thursday 15 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 14 minutes.

Decide it for

BaodingDelhiKolkataSingaporeSydneyJersey City

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two evenings

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

Evening of Thursday 15 October

Taken. The only evening Trayodaśī reaches.

17:40 sunsetpradoṣa ends 19:22
Trayodaśī begins 19:08:40
17:1617:4018:0418:2818:5219:1619:40

14 of 102 minutes covered, the last 14

Evening of Friday 16 October

Trayodaśī is absent from pradoṣa. Not taken.

17:38 sunsetpradoṣa ends 19:21
17:1417:3818:0218:2618:5019:1419:38

0 of 103 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 19:09 on Thu 15 Oct to 17:01 on Fri 16 Oct.

    2009-10-15T11:08:41Z → 2009-10-16T09:01:15Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:40–19:22 on the 15th, 17:38–19:21 on the 16th.

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

  3. 03

    Rule

    Trayodaśī must be present during pradoṣa. It covers 14 of 102 minutes on the 15th and 0 of 103 on the 16th.

    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 821 s

  5. 05

    Ruling

    Yama Dīpadāna, Baoding, 2009: Thursday 15 October.

    confidence: determinate

Say it like this

In Baoding, Yama Dīpadāna 2009 falls on Thursday 15 October. Trayodaśī runs from 19:09 on Thu 15 Oct to 17:01 on Fri 16 Oct and covers 14 of 102 minutes of pradoṣa that evening.

ahargana.org/baoding/festivals/2009/yama-dipadana · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 15 Oct
Ahargaṇa, classicalDisc centre, no refractionThu 15 Oct
compat-drikpanchangComparison profileThu 15 Oct
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-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 15thCoveredSunset 16thCoveredRuled
Los Angeles04:09 → 02:0118:18101 min18:170 min15 Oct
Chicago06:09 → 04:0118:08103 min18:070 min15 Oct
Jersey City07:09 → 05:0118:15103 min18:140 min15 Oct
Port of Spain07:09 → 05:0117:4897 min17:480 min15 Oct
London12:09 → 10:0118:07107 min18:050 min15 Oct
Durban13:09 → 11:0118:0590 min18:060 min15 Oct
Dubai15:09 → 13:0117:5299 min17:510 min15 Oct
Delhi16:39 → 14:3117:51100 min17:500 min15 Oct
Kolkata16:39 → 14:3117:1199 min17:100 min15 Oct
Singapore19:09 → 17:0118:5379 min18:520 min15 Oct
Sydney22:09 → 20:0119:080 min19:0952 min16 Oct
Suva23:09 → 21:0118:070 min18:0792 min16 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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