Ruling · Śītalāṣṭamī · 2087

Thursday 27 March

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 232 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 27 March

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:22  12:10 madhyāhna ends
10:3410:5811:2211:4612:1012:3412:58

48 of 48 minutes covered

Midday of Friday 28 March

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:22  12:10 madhyāhna ends
10:3410:5811:2211:4612:1012:3412:58

0 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 06:29 on Thu 27 Mar to 07:30 on Fri 28 Mar.

    2087-03-26T22:28:38Z → 2087-03-27T23:30:01Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:22–12:10 on the 27th, 11:22–12:10 on the 28th.

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

  3. 03

    Rule

    Aṣṭamī must be present during madhyāhna. It covers 48 of 48 minutes on the 27th and 0 of 48 on the 28th.

    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 13904 s

  5. 05

    Ruling

    Śītalāṣṭamī, Daqing, 2087: Thursday 27 March.

    confidence: determinate

Say it like this

In Daqing, Śītalāṣṭamī 2087 falls on Thursday 27 March. Aṣṭamī runs from 06:29 on Thu 27 Mar to 07:30 on Fri 28 Mar and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/2087/shitalashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 27 Mar
Ahargaṇa, classicalDisc centre, no refractionThu 27 Mar
compat-drikpanchangComparison profileThu 27 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 26thCoveredMadhyāhna 27thCoveredRuled
Los Angeles15:29 → 16:3012:350 min12:3548 min27 Mar
Chicago17:29 → 18:3012:330 min12:3248 min27 Mar
Jersey City18:29 → 19:3012:380 min12:3848 min27 Mar
Port of Spain18:29 → 19:3011:480 min11:4848 min27 Mar
London22:29 → 23:3011:430 min11:4348 min27 Mar
Durban00:29 → 01:3011:380 min11:3748 min27 Mar
Dubai02:29 → 03:3012:010 min12:0148 min27 Mar
Delhi03:59 → 05:0012:030 min12:0348 min27 Mar
Kolkata03:59 → 05:0011:190 min11:1848 min27 Mar
Singapore06:29 → 07:3012:470 min12:4648 min27 Mar
Sydney09:29 → 10:3012:370 min12:3748 min27 Mar
Suva10:29 → 11:3011:480 min11:4848 min27 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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