Ruling · Śītalāṣṭamī · 2049

Saturday 27 March

Boundaryin Daqing, under the Rashtriya Panchang method. A threshold is only 0 min 02 s away. Say “contested”.

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 Friday 26 March

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:22  12:10 madhyāhna ends
Aṣṭamī begins 12:10:06
10:3410:5811:2211:4612:1012:3412:58

0 of 48 minutes covered

Midday of Saturday 27 March

Taken. Aṣṭamī reaches neither midday; the rule takes the second day.

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 12:10 on Fri 26 Mar to 10:08 on Sat 27 Mar.

    2049-03-26T04:10:07Z → 2049-03-27T02:08:18Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:22–12:10 on the 26th, 11:22–12:10 on the 27th.

    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 26th and 0 of 48 on the 27th.

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

  4. 04

    Tie-break

    Neither midday qualifies. The rule takes the second day.

    priority: purvaviddha → second-day · margin 2 s < 300 s

  5. 05

    Ruling

    Śītalāṣṭamī, Daqing, 2049: Saturday 27 March.

    confidence: boundary (margin)

Say it like this

In Daqing, Śītalāṣṭamī 2049 falls on Saturday 27 March. Aṣṭamī runs from 12:10 on Fri 26 Mar to 10:08 on Sat 27 Mar, and reaches madhyāhna on neither day. It is 0 min 02 s from a threshold: treat the date as contested.

ahargana.org/daqing/festivals/2049/shitalashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 27 Mar
Ahargaṇa, classicalDisc centre, no refractionSat 27 Mar
compat-drikpanchangComparison profileFri 26 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 Angeles21:10 → 19:0812:3548 min12:340 min26 Mar
Chicago23:10 → 21:0812:3248 min12:320 min26 Mar
Jersey City00:10 → 22:0812:3848 min12:380 min26 Mar
Port of Spain00:10 → 22:0811:4848 min11:470 min26 Mar
London04:10 → 02:0811:4348 min11:420 min26 Mar
Durban06:10 → 04:0811:3748 min11:370 min26 Mar
Dubai08:10 → 06:0812:0148 min12:000 min26 Mar
Delhi09:40 → 07:3812:0348 min12:030 min26 Mar
Kolkata09:40 → 07:3811:1848 min11:180 min26 Mar
Singapore12:10 → 10:0812:4648 min12:460 min26 Mar
Sydney15:10 → 13:0812:370 min12:3632 min27 Mar
Suva16:10 → 14:0811:480 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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