Ruling · Śītalāṣṭamī · 1982

Wednesday 17 March

Determinatein Tehran, under the Rashtriya Panchang method. Clear of every threshold by 106 minutes.

Decide it for

TehranDelhiKolkataSingaporeSydneyJersey City

35°42′ N 51°25′ E · Asia/Tehran · GeoNames 112931

The two middays

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

Midday of Wednesday 17 March

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:49  12:37 madhyāhna ends
11:0111:2511:4912:1312:3713:0113:25

48 of 48 minutes covered

Midday of Thursday 18 March

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:49  12:37 madhyāhna ends
11:0111:2511:4912:1312:3713:0113:25

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 07:26 on Wed 17 Mar to 10:02 on Thu 18 Mar.

    1982-03-17T03:55:47Z → 1982-03-18T06:32:28Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:49–12:37 on the 17th, 11:49–12:37 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 48 of 48 minutes on the 17th and 0 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 6381 s

  5. 05

    Ruling

    Śītalāṣṭamī, Tehran, 1982: Wednesday 17 March.

    confidence: determinate

Say it like this

In Tehran, Śītalāṣṭamī 1982 falls on Wednesday 17 March. Aṣṭamī runs from 07:26 on Wed 17 Mar to 10:02 on Thu 18 Mar and covers all of madhyāhna that midday.

ahargana.org/tehran/festivals/1982/shitalashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 17 Mar
Ahargaṇa, classicalDisc centre, no refractionWed 17 Mar
compat-drikpanchangComparison profileWed 17 Mar
No institution has a recorded ruling for Tehran.

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 Angeles19:56 → 22:3211:3848 min11:370 min17 Mar
Chicago21:56 → 00:3211:3548 min11:350 min17 Mar
Jersey City22:56 → 01:3211:4148 min11:410 min17 Mar
Port of Spain23:56 → 02:3211:5148 min11:500 min17 Mar
London03:56 → 06:3211:4548 min11:450 min17 Mar
Durban05:56 → 08:3211:4048 min11:400 min17 Mar
Dubai07:56 → 10:3212:0348 min12:030 min17 Mar
Delhi09:26 → 12:0212:0648 min12:060 min17 Mar
Kolkata09:26 → 12:0211:2148 min11:2142 min17 Mar
Singapore11:56 → 14:3212:4948 min12:4948 min17 Mar
Sydney14:56 → 17:3212:390 min12:3948 min18 Mar
Suva15:56 → 18:3211:510 min11:5048 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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