Ruling · Śītalāṣṭamī · 1941

Thursday 20 March

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 604 minutes.

Decide it for

DaqingDelhiKolkataSingaporeSydneyJersey City

46°35′ N 125°00′ E · Asia/Shanghai · GeoNames 2037860

The two middays

One ghaṭī is 24 minutes. Madhyāhna is 1 ghaṭikā either side of midday.

Midday of Wednesday 19 March

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 12:24  13:12 madhyāhna ends
11:3612:0012:2412:4813:1213:3614:00

0 of 48 minutes covered

Midday of Thursday 20 March

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 12:24  13:12 madhyāhna ends
11:3612:0012:2412:4813:1213:3614:00

48 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Aṣṭamī runs from 00:35 on Thu 20 Mar to 23:16 on Thu 20 Mar.

    1941-03-19T15:35:16Z → 1941-03-20T14:16:11Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:24–13:12 on the 19th, 12:24–13:12 on the 20th.

    madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Aṣṭamī must be present during madhyāhna. It covers 0 of 48 minutes on the 19th and 48 of 48 on the 20th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105

  4. 04

    Tie-break

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

    priority: purvaviddha → only-day · margin 36243 s

  5. 05

    Ruling

    Śītalāṣṭamī, Daqing, 1941: Thursday 20 March.

    confidence: determinate

Say it like this

In Daqing, Śītalāṣṭamī 1941 falls on Thursday 20 March. Aṣṭamī runs from 00:35 on Thu 20 Mar to 23:16 on Thu 20 Mar and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/1941/shitalashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 20 Mar
Ahargaṇa, classicalDisc centre, no refractionThu 20 Mar
compat-drikpanchangComparison profileThu 20 Mar
No institution has a recorded ruling for Daqing.

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

The rule, as data

/rules/shitalashtami · ruleset 2026.3-draft

Month
Phālguna, amānta
Pakṣa · aṅga
Kṛṣṇa · Aṣṭamī
Kāla
Madhyāhna
Priority
Pūrvaviddhā
Tie-break
First day
Reference
CRC 1955, p. 105

“K 8 Sitalastami, (purvaviddha)” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceAṣṭamīMadhyāhna 19thCoveredMadhyāhna 20thCoveredRuled
Los Angeles07:35 → 06:1611:3748 min11:370 min19 Mar
Chicago09:35 → 08:1611:3548 min11:350 min19 Mar
Jersey City10:35 → 09:1611:4148 min11:400 min19 Mar
Port of Spain11:35 → 10:1611:5048 min11:500 min19 Mar
London16:35 → 15:1612:450 min12:4548 min20 Mar
Durban17:35 → 16:1611:400 min11:3948 min20 Mar
Dubai19:35 → 18:1612:030 min12:0348 min20 Mar
Delhi21:05 → 19:4612:050 min12:0548 min20 Mar
Kolkata21:05 → 19:4611:210 min11:2048 min20 Mar
Singapore22:55 → 21:3612:090 min12:0848 min20 Mar
Sydney01:35 → 00:1611:390 min11:3948 min20 Mar
Suva03:35 → 02:1611:500 min11:5048 min20 Mar
Profile · tradition
pac-rp@2026.1 · smarta
Rule
shitalashtami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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