Ruling · Śītalāṣṭamī · 2097

Friday 5 April

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 335 minutes.

Decide it for

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 Thursday 4 April

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:20  12:08 madhyāhna ends
10:3210:5611:2011:4412:0812:3212:56

0 of 48 minutes covered

Midday of Friday 5 April

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:19  12:07 madhyāhna ends
10:3110:5511:1911:4312:0712:3112:55

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 17:43 on Thu 4 Apr to 19:54 on Fri 5 Apr.

    2097-04-04T09:42:39Z → 2097-04-05T11:54:29Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:20–12:08 on the 4th, 11:19–12:07 on the 5th.

    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 4th and 48 of 48 on the 5th.

    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 20102 s

  5. 05

    Ruling

    Śītalāṣṭamī, Daqing, 2097: Friday 5 April.

    confidence: determinate

Say it like this

In Daqing, Śītalāṣṭamī 2097 falls on Friday 5 April. Aṣṭamī runs from 17:43 on Thu 4 Apr to 19:54 on Fri 5 Apr and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/2097/shitalashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 5 Apr
Ahargaṇa, classicalDisc centre, no refractionFri 5 Apr
compat-drikpanchangComparison profileFri 5 Apr
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 4thCoveredMadhyāhna 5thCoveredRuled
Los Angeles02:43 → 04:5412:3248 min12:320 min4 Apr
Chicago04:43 → 06:5412:3048 min12:300 min4 Apr
Jersey City05:43 → 07:5412:3648 min12:350 min4 Apr
Port of Spain05:43 → 07:5411:4548 min11:450 min4 Apr
London10:43 → 12:5412:4048 min12:4015 min4 Apr
Durban11:43 → 13:5411:3540 min11:3448 min4 Apr
Dubai13:43 → 15:5411:580 min11:5848 min5 Apr
Delhi15:13 → 17:2412:000 min12:0048 min5 Apr
Kolkata15:13 → 17:2411:160 min11:1648 min5 Apr
Singapore17:43 → 19:5412:440 min12:4348 min5 Apr
Sydney20:43 → 22:5412:340 min12:3448 min5 Apr
Suva21:43 → 23:5411:450 min11:4548 min5 Apr
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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