Ruling · Yama Dīpadāna · 2025

Saturday 18 October

Determinatein Ujjain, under the Rashtriya Panchang method. Clear of every threshold by 245 minutes.

Decide it for

UjjainDelhiKolkataSingaporeSydneyJersey City

23°11′ N 75°47′ E · Asia/Kolkata · GeoNames 1253914

The two evenings

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

Evening of Saturday 18 October

Taken. The only evening Trayodaśī reaches.

17:58 sunsetpradoṣa ends 19:38
17:3417:5818:2218:4619:1019:3419:58

100 of 100 minutes covered

Evening of Sunday 19 October

Trayodaśī is absent from pradoṣa. Not taken.

17:58 sunsetpradoṣa ends 19:37
17:3417:5818:2218:4619:1019:3419:58

0 of 100 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 12:20 on Sat 18 Oct to 13:52 on Sun 19 Oct.

    2025-10-18T06:49:41Z → 2025-10-19T08:22:10Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:58–19:38 on the 18th, 17:58–19:37 on the 19th.

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

  3. 03

    Rule

    Trayodaśī must be present during pradoṣa. It covers 100 of 100 minutes on the 18th and 0 of 100 on the 19th.

    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 14728 s

  5. 05

    Ruling

    Yama Dīpadāna, Ujjain, 2025: Saturday 18 October.

    confidence: determinate

Say it like this

In Ujjain, Yama Dīpadāna 2025 falls on Saturday 18 October. Trayodaśī runs from 12:20 on Sat 18 Oct to 13:52 on Sun 19 Oct and covers all of pradoṣa that evening.

ahargana.org/ujjain/festivals/2025/yama-dipadana · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 18 Oct
Ahargaṇa, classicalDisc centre, no refractionSat 18 Oct
compat-drikpanchangComparison profileSat 18 Oct
No institution has a recorded ruling for Ujjain.

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 18thCoveredSunset 19thCoveredRuled
Los Angeles23:50 → 01:2218:14102 min18:130 min18 Oct
Chicago01:50 → 03:2218:04105 min18:020 min18 Oct
Jersey City02:50 → 04:2218:11104 min18:090 min18 Oct
Port of Spain02:50 → 04:2217:4797 min17:460 min18 Oct
London07:50 → 09:2218:00108 min17:580 min18 Oct
Durban08:50 → 10:2218:0889 min18:080 min18 Oct
Dubai10:50 → 12:2217:49100 min17:480 min18 Oct
Delhi12:20 → 13:5217:48101 min17:470 min18 Oct
Kolkata12:20 → 13:5217:09100 min17:080 min18 Oct
Singapore14:50 → 16:2218:5295 min18:520 min18 Oct
Sydney17:50 → 19:2219:1188 min19:1111 min18 Oct
Suva18:50 → 20:2218:0850 min18:0892 min19 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