Ruling · Śītalāṣṭamī · 1987

Monday 23 March

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 36 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 Sunday 22 March

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 12:02  12:50 madhyāhna ends
Aṣṭamī begins 13:25:43
11:1411:3812:0212:2612:5013:1413:38

0 of 48 minutes covered

Midday of Monday 23 March

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

madhyāhna begins 12:01  12:49 madhyāhna ends
Aṣṭamī ends 11:15:19
11:1311:3712:0112:2512:4913:1313:37

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 13:26 on Sun 22 Mar to 11:15 on Mon 23 Mar.

    1987-03-22T05:25:43Z → 1987-03-23T03:15:19Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:02–12:50 on the 22nd, 12:01–12:49 on the 23rd.

    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 22nd and 0 of 48 on the 23rd.

    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 2166 s

  5. 05

    Ruling

    Śītalāṣṭamī, Baoding, 1987: Monday 23 March.

    confidence: determinate

Say it like this

In Baoding, Śītalāṣṭamī 1987 falls on Monday 23 March. Aṣṭamī runs from 13:26 on Sun 22 Mar to 11:15 on Mon 23 Mar, and reaches madhyāhna on neither day.

ahargana.org/baoding/festivals/1987/shitalashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 23 Mar
Ahargaṇa, classicalDisc centre, no refractionMon 23 Mar
compat-drikpanchangComparison profileSun 22 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 22ndCoveredMadhyāhna 23rdCoveredRuled
Los Angeles21:26 → 19:1511:3648 min11:360 min22 Mar
Chicago23:26 → 21:1511:3448 min11:340 min22 Mar
Jersey City00:26 → 22:1511:4048 min11:390 min22 Mar
Port of Spain01:26 → 23:1511:4948 min11:490 min22 Mar
London05:26 → 03:1511:4448 min11:440 min22 Mar
Durban07:26 → 05:1511:3948 min11:380 min22 Mar
Dubai09:26 → 07:1512:0248 min12:020 min22 Mar
Delhi10:56 → 08:4512:0448 min12:040 min22 Mar
Kolkata10:56 → 08:4511:2048 min11:200 min22 Mar
Singapore13:26 → 11:1512:4810 min12:470 min22 Mar
Sydney15:26 → 13:1511:380 min11:3848 min23 Mar
Suva17:26 → 15:1511:490 min11:4948 min23 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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