Ruling · Śītalāṣṭamī · 2051

Tuesday 4 April

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 371 minutes.

Decide it for

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two middays

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

Midday of Tuesday 4 April

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:58  12:46 madhyāhna ends
11:1011:3411:5812:2212:4613:1013:34

48 of 48 minutes covered

Midday of Wednesday 5 April

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:57  12:45 madhyāhna ends
11:0911:3311:5712:2112:4513:0913:33

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 05:47 on Tue 4 Apr to 05:24 on Wed 5 Apr.

    2051-04-03T21:46:40Z → 2051-04-04T21:24:17Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:58–12:46 on the 4th, 11:57–12:45 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 48 of 48 minutes on the 4th and 0 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 22258 s

  5. 05

    Ruling

    Śītalāṣṭamī, Baoding, 2051: Tuesday 4 April.

    confidence: determinate

Say it like this

In Baoding, Śītalāṣṭamī 2051 falls on Tuesday 4 April. Aṣṭamī runs from 05:47 on Tue 4 Apr to 05:24 on Wed 5 Apr and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2051/shitalashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 4 Apr
Ahargaṇa, classicalDisc centre, no refractionTue 4 Apr
compat-drikpanchangComparison profileTue 4 Apr
No institution has a recorded ruling for Baoding.

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 3rdCoveredMadhyāhna 4thCoveredRuled
Los Angeles14:47 → 14:2412:320 min12:3248 min4 Apr
Chicago16:47 → 16:2412:300 min12:3048 min4 Apr
Jersey City17:47 → 17:2412:360 min12:3648 min4 Apr
Port of Spain17:47 → 17:2411:450 min11:4548 min4 Apr
London22:47 → 22:2412:400 min12:4048 min4 Apr
Durban23:47 → 23:2411:350 min11:3548 min4 Apr
Dubai01:47 → 01:2411:580 min11:5848 min4 Apr
Delhi03:17 → 02:5412:010 min12:0048 min4 Apr
Kolkata03:17 → 02:5411:160 min11:1648 min4 Apr
Singapore05:47 → 05:2412:440 min12:4448 min4 Apr
Sydney07:47 → 07:2411:340 min11:3448 min4 Apr
Suva09:47 → 09:2411:460 min11:4548 min4 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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