Ruling · Yama Dīpadāna · 1988

Monday 7 November

Boundaryin Baoding, under the Rashtriya Panchang method. Both evenings qualify and the rule does not say which to take. Say “contested”.

Decide it for

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 Sunday 6 November

Qualifies with 87 of 109 minutes. Not taken.

17:12 sunsetpradoṣa ends 19:02
Trayodaśī begins 17:34:49
16:4817:1217:3618:0018:2418:4819:12

87 of 109 minutes covered, the last 87

Evening of Monday 7 November

Taken. Both evenings qualify; the rule is silent, and this one is covered longer.

17:11 sunsetpradoṣa ends 19:01
16:4717:1117:3517:5918:2318:4719:11

110 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 17:35 on Sun 6 Nov to 19:39 on Mon 7 Nov.

    1988-11-06T09:34:49Z → 1988-11-07T11:39:24Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:12–19:02 on the 6th, 17:11–19:01 on the 7th.

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

  3. 03

    Rule

    Trayodaśī must be present during pradoṣa. It covers 87 of 109 minutes on the 6th and 110 of 110 on the 7th.

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

  4. 04

    Tie-break

    Both evenings qualify and the rule marks neither. The one covered longer is ruled, as a boundary.

    priority: unstated → greater-coverage · margin 1352 s

  5. 05

    Ruling

    Yama Dīpadāna, Baoding, 1988: Monday 7 November.

    confidence: boundary (tie-break-unstated)

Say it like this

In Baoding, Yama Dīpadāna 1988 falls on Monday 7 November. Trayodaśī runs from 17:35 on Sun 6 Nov to 19:39 on Mon 7 Nov and covers all of pradoṣa that evening. It also reaches the previous evening for 87 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested.

ahargana.org/baoding/festivals/1988/yama-dipadana · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 7 Nov
Ahargaṇa, classicalDisc centre, no refractionMon 7 Nov
compat-drikpanchangComparison profileMon 7 Nov
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 6thCoveredSunset 7thCoveredRuled
Los Angeles01:35 → 03:3916:55107 min16:540 min6 Nov
Chicago03:35 → 05:3916:38111 min16:370 min6 Nov
Jersey City04:35 → 06:3916:46110 min16:450 min6 Nov
Port of Spain05:35 → 07:3917:4098 min17:400 min6 Nov
London09:35 → 11:3916:24117 min16:220 min6 Nov
Durban11:35 → 13:3918:2285 min18:230 min6 Nov
Dubai13:35 → 15:3917:35103 min17:340 min6 Nov
Delhi15:05 → 17:0917:32105 min17:310 min6 Nov
Kolkata15:05 → 17:0916:56102 min16:5614 min6 Nov
Singapore17:35 → 19:3918:5096 min18:5049 min6 Nov
Sydney20:35 → 22:3919:2716 min19:2883 min7 Nov
Suva21:35 → 23:3918:150 min18:1689 min7 Nov
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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