Ruling · Śītalāṣṭamī · 2009

Wednesday 18 March

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 17 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 Wednesday 18 March

Taken. Both middays qualify; the rule takes the first.

madhyāhna begins 12:03  12:51 madhyāhna ends
Aṣṭamī begins 12:33:05
11:1511:3912:0312:2712:5113:1513:39

17 of 48 minutes covered, the last 17

Midday of Thursday 19 March

Qualifies with 48 of 48 minutes. Not taken.

madhyāhna begins 12:02  12:50 madhyāhna ends
11:1411:3812:0212:2612:5013:1413:38

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 12:33 on Wed 18 Mar to 15:05 on Thu 19 Mar.

    2009-03-18T04:33:06Z → 2009-03-19T07:04:53Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:03–12:51 on the 18th, 12:02–12:50 on the 19th.

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

  3. 03

    Rule

    Aṣṭamī must be present during madhyāhna. It covers 17 of 48 minutes on the 18th and 48 of 48 on the 19th.

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

  4. 04

    Tie-break

    Both middays qualify. Pūrvaviddhā: the first is taken.

    priority: purvaviddha → purvaviddha · margin 1049 s

  5. 05

    Ruling

    Śītalāṣṭamī, Baoding, 2009: Wednesday 18 March.

    confidence: determinate

Say it like this

In Baoding, Śītalāṣṭamī 2009 falls on Wednesday 18 March. Aṣṭamī runs from 12:33 on Wed 18 Mar to 15:05 on Thu 19 Mar and covers 17 of 48 minutes of madhyāhna that midday. It also reaches the next midday for 48 minutes; by the rule the first midday is taken.

ahargana.org/baoding/festivals/2009/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 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 18thCoveredMadhyāhna 19thCoveredRuled
Los Angeles21:33 → 00:0512:3748 min12:370 min18 Mar
Chicago23:33 → 02:0512:3548 min12:350 min18 Mar
Jersey City00:33 → 03:0512:4148 min12:400 min18 Mar
Port of Spain00:33 → 03:0511:5048 min11:500 min18 Mar
London04:33 → 07:0511:4548 min11:450 min18 Mar
Durban06:33 → 09:0511:4048 min11:390 min18 Mar
Dubai08:33 → 11:0512:0348 min12:030 min18 Mar
Delhi10:03 → 12:3512:0548 min12:0530 min18 Mar
Kolkata10:03 → 12:3511:2148 min11:2148 min18 Mar
Singapore12:33 → 15:0512:4948 min12:4848 min18 Mar
Sydney15:33 → 18:0512:390 min12:3948 min19 Mar
Suva16:33 → 19:0511:500 min11:5048 min19 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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