Ruling · Jitāṣṭamī (Jitiya) · 2018

Tuesday 2 October

Determinatein Datong, under the Rashtriya Panchang method. Clear of every threshold by 541 minutes.

Decide it for

DatongDelhiKolkataSingaporeSydneyJersey City

40°06′ N 113°17′ E · Asia/Shanghai · GeoNames 2037799

The two evenings

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

Evening of Monday 1 October

Aṣṭamī is absent from pradoṣa. Not taken.

18:10 sunsetpradoṣa ends 19:48
17:4618:1018:3418:5819:2219:4620:10

0 of 98 minutes covered

Evening of Tuesday 2 October

Taken. The only evening Aṣṭamī reaches.

18:08 sunsetpradoṣa ends 19:46
17:4418:0818:3218:5619:2019:4420:08

98 of 98 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Aṣṭamī runs from 06:39 on Tue 2 Oct to 04:47 on Wed 3 Oct.

    2018-10-01T22:39:25Z → 2018-10-02T20:47:26Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 18:10–19:48 on the 1st, 18:08–19:46 on the 2nd.

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

  3. 03

    Rule

    Aṣṭamī must be present during pradoṣa. It covers 0 of 98 minutes on the 1st and 98 of 98 on the 2nd.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103

  4. 04

    Tie-break

    Only one evening qualifies. No tie-break is needed.

    priority: unstated → only-day · margin 32469 s

  5. 05

    Ruling

    Jitāṣṭamī, Datong, 2018: Tuesday 2 October.

    confidence: determinate

Say it like this

In Datong, Jitāṣṭamī (Jitiya) 2018 falls on Tuesday 2 October. Aṣṭamī runs from 06:39 on Tue 2 Oct to 04:47 on Wed 3 Oct and covers all of pradoṣa that evening.

ahargana.org/datong/festivals/2018/jitashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 2 Oct
Ahargaṇa, classicalDisc centre, no refractionTue 2 Oct
compat-drikpanchangComparison profileTue 2 Oct
No institution has a recorded ruling for Datong.

Institutional rulings are recorded with a source address, and are never edited to agree.

The rule, as data

/rules/jitashtami · ruleset 2026.3-draft

Month
Bhādrapada, amānta
Pakṣa · aṅga
Kṛṣṇa · Aṣṭamī
Kāla
Pradoṣa
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 103

“K 8 Mahalaksmi vrata samapana (current at moonrise), Jitastami (pradosa), Jimutavahana puja” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceAṣṭamīSunset 1stCoveredSunset 2ndCoveredRuled
Los Angeles15:39 → 13:4718:3798 min18:350 min1 Oct
Chicago17:39 → 15:4718:3298 min18:300 min1 Oct
Jersey City18:39 → 16:4718:3897 min18:360 min1 Oct
Port of Spain18:39 → 16:4717:5653 min17:560 min1 Oct
London23:39 → 21:4718:380 min18:36100 min2 Oct
Durban00:39 → 22:4717:570 min17:5793 min2 Oct
Dubai02:39 → 00:4718:060 min18:0597 min2 Oct
Delhi04:09 → 02:1718:070 min18:0697 min2 Oct
Kolkata04:09 → 02:1717:240 min17:2397 min2 Oct
Singapore06:39 → 04:4718:570 min18:5795 min2 Oct
Sydney08:39 → 06:4717:570 min17:5892 min2 Oct
Suva10:39 → 08:4718:030 min18:0494 min2 Oct
Profile · tradition
pac-rp@2026.1 · smarta
Rule
jitashtami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

About Ahargaṇa