Ruling · Yama Dīpadāna · 1979

Thursday 18 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 532 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 Wednesday 17 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

Evening of Thursday 18 October

Taken. The only evening Trayodaśī reaches.

17:37 sunsetpradoṣa ends 19:20
17:1317:3718:0118:2518:4919:1319:37

103 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 04:13 on Thu 18 Oct to 06:39 on Fri 19 Oct.

    1979-10-17T20:12:37Z → 1979-10-18T22:38:52Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:38–19:21 on the 17th, 17:37–19:20 on the 18th.

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

  3. 03

    Rule

    Trayodaśī must be present during pradoṣa. It covers 0 of 103 minutes on the 17th and 103 of 103 on the 18th.

    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 31898 s

  5. 05

    Ruling

    Yama Dīpadāna, Baoding, 1979: Thursday 18 October.

    confidence: determinate

Say it like this

In Baoding, Yama Dīpadāna 1979 falls on Thursday 18 October. Trayodaśī runs from 04:13 on Thu 18 Oct to 06:39 on Fri 19 Oct and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/1979/yama-dipadana · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 18 Oct
Ahargaṇa, classicalDisc centre, no refractionThu 18 Oct
compat-drikpanchangComparison profileThu 18 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 17thCoveredSunset 18thCoveredRuled
Los Angeles13:13 → 15:3918:17102 min18:150 min17 Oct
Chicago15:13 → 17:3918:07104 min18:050 min17 Oct
Jersey City16:13 → 18:3918:14104 min18:1227 min17 Oct
Port of Spain16:13 → 18:3917:4897 min17:4752 min17 Oct
London21:13 → 23:3918:040 min18:02108 min18 Oct
Durban22:13 → 00:3918:060 min18:0789 min18 Oct
Dubai00:13 → 02:3917:500 min17:50100 min18 Oct
Delhi01:43 → 04:0917:500 min17:49101 min18 Oct
Kolkata01:43 → 04:0917:100 min17:0999 min18 Oct
Singapore03:43 → 06:0918:220 min18:2295 min18 Oct
Sydney06:13 → 08:3918:090 min18:1088 min18 Oct
Suva08:13 → 10:3918:070 min18:0792 min18 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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