Ruling · Yama Dīpadāna · 1971

Saturday 16 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 402 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 Saturday 16 October

Taken. The only evening Trayodaśī reaches.

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

103 of 103 minutes covered

Evening of Sunday 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

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

How it was decided

  1. 01

    Aṅga

    Trayodaśī runs from 08:25 on Sat 16 Oct to 10:56 on Sun 17 Oct.

    1971-10-16T00:24:47Z → 1971-10-17T02:55:41Z

  2. 02

    Kāla

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

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

  3. 03

    Rule

    Trayodaśī must be present during pradoṣa. It covers 103 of 103 minutes on the 16th and 0 of 103 on the 17th.

    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 24148 s

  5. 05

    Ruling

    Yama Dīpadāna, Baoding, 1971: Saturday 16 October.

    confidence: determinate

Say it like this

In Baoding, Yama Dīpadāna 1971 falls on Saturday 16 October. Trayodaśī runs from 08:25 on Sat 16 Oct to 10:56 on Sun 17 Oct and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/1971/yama-dipadana · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 16 Oct
Ahargaṇa, classicalDisc centre, no refractionSat 16 Oct
compat-drikpanchangComparison profileSat 16 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 16thCoveredSunset 17thCoveredRuled
Los Angeles17:25 → 19:5618:1898 min18:170 min15 Oct
Chicago19:25 → 21:5618:08104 min18:070 min16 Oct
Jersey City20:25 → 22:5618:15103 min18:140 min16 Oct
Port of Spain20:25 → 22:5617:4897 min17:480 min16 Oct
London01:25 → 03:5618:06107 min18:040 min16 Oct
Durban02:25 → 04:5618:0690 min18:060 min16 Oct
Dubai04:25 → 06:5617:51100 min17:500 min16 Oct
Delhi05:55 → 08:2617:51100 min17:500 min16 Oct
Kolkata05:55 → 08:2617:1199 min17:100 min16 Oct
Singapore07:55 → 10:2618:2395 min18:220 min16 Oct
Sydney10:25 → 12:5618:0889 min18:090 min16 Oct
Suva12:25 → 14:5618:0792 min18:070 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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