Ruling · Śītalāṣṭamī · 2031

Sunday 16 March

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 508 minutes.

Decide it for

BaodingDelhiKolkataSingaporeSydneyJersey City

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 16 March

Taken. The only midday Aṣṭamī reaches.

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

48 of 48 minutes covered

Midday of Monday 17 March

Aṣṭamī is absent from madhyāhna. Not taken.

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

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 03:36 on Sun 16 Mar to 01:34 on Mon 17 Mar.

    2031-03-15T19:35:41Z → 2031-03-16T17:34:07Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:03–12:51 on the 16th, 12:03–12:51 on the 17th.

    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 16th and 0 of 48 on the 17th.

    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 30453 s

  5. 05

    Ruling

    Śītalāṣṭamī, Baoding, 2031: Sunday 16 March.

    confidence: determinate

Say it like this

In Baoding, Śītalāṣṭamī 2031 falls on Sunday 16 March. Aṣṭamī runs from 03:36 on Sun 16 Mar to 01:34 on Mon 17 Mar and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2031/shitalashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 16 Mar
Ahargaṇa, classicalDisc centre, no refractionSun 16 Mar
compat-drikpanchangComparison profileSun 16 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 15thCoveredMadhyāhna 16thCoveredRuled
Los Angeles12:36 → 10:3412:3848 min12:380 min15 Mar
Chicago14:36 → 12:3412:360 min12:360 min16 Mar
Jersey City15:36 → 13:3412:420 min12:4148 min16 Mar
Port of Spain15:36 → 13:3411:510 min11:5148 min16 Mar
London19:36 → 17:3411:460 min11:4648 min16 Mar
Durban21:36 → 19:3411:410 min11:4048 min16 Mar
Dubai23:36 → 21:3412:040 min12:0448 min16 Mar
Delhi01:06 → 23:0412:060 min12:0648 min16 Mar
Kolkata01:06 → 23:0411:220 min11:2148 min16 Mar
Singapore03:36 → 01:3412:500 min12:4948 min16 Mar
Sydney06:36 → 04:3412:400 min12:4048 min16 Mar
Suva07:36 → 05:3411:510 min11:5148 min16 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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