Ruling · Śītalāṣṭamī · 1925

Wednesday 18 March

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 5 min 59 s.

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 Tuesday 17 March

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:25  12:13 madhyāhna ends
10:3711:0111:2511:4912:1312:3713:01

0 of 48 minutes covered

Midday of Wednesday 18 March

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:25  12:13 madhyāhna ends
Aṣṭamī ends 12:18:46
10:3711:0111:2511:4912:1312:3713:01

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 14:22 on Tue 17 Mar to 12:19 on Wed 18 Mar.

    1925-03-17T06:22:11Z → 1925-03-18T04:18:46Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:25–12:13 on the 17th, 11:25–12:13 on the 18th.

    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 17th and 48 of 48 on the 18th.

    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 359 s

  5. 05

    Ruling

    Śītalāṣṭamī, Daqing, 1925: Wednesday 18 March.

    confidence: determinate

Say it like this

In Daqing, Śītalāṣṭamī 1925 falls on Wednesday 18 March. Aṣṭamī runs from 14:22 on Tue 17 Mar to 12:19 on Wed 18 Mar and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/1925/shitalashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 18 Mar
Ahargaṇa, classicalDisc centre, no refractionWed 18 Mar
compat-drikpanchangComparison profileWed 18 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 17thCoveredMadhyāhna 18thCoveredRuled
Los Angeles22:22 → 20:1911:3848 min11:370 min17 Mar
Chicago00:22 → 22:1911:3548 min11:350 min17 Mar
Jersey City01:22 → 23:1911:4148 min11:410 min17 Mar
Port of Spain02:22 → 00:1911:5148 min11:500 min17 Mar
London06:22 → 04:1911:4648 min11:450 min17 Mar
Durban08:22 → 06:1911:4048 min11:400 min17 Mar
Dubai10:22 → 08:1912:0448 min12:030 min17 Mar
Delhi11:52 → 09:4912:0648 min12:060 min17 Mar
Kolkata11:52 → 09:4911:2117 min11:210 min17 Mar
Singapore13:22 → 11:1911:490 min11:490 min18 Mar
Sydney16:22 → 14:1911:400 min11:3948 min18 Mar
Suva18:22 → 16:1911:510 min11:5148 min18 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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