Ruling · Sūrya Ṣaṣṭhī (Chhath) · 1900

Monday 29 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 378 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 Monday 29 October

Taken. The only midday Ṣaṣṭhī reaches.

madhyāhna begins 11:43  12:31 madhyāhna ends
10:5511:1911:4312:0712:3112:5513:19

48 of 48 minutes covered

Midday of Tuesday 30 October

Ṣaṣṭhī is absent from madhyāhna. Not taken.

madhyāhna begins 11:43  12:31 madhyāhna ends
10:5511:1911:4312:0712:3112:5513:19

0 of 48 minutes covered

Ṣaṣṭhī presentMadhyāhna, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Ṣaṣṭhī runs from 05:18 on Mon 29 Oct to 05:25 on Tue 30 Oct.

    1900-10-28T21:12:57Z → 1900-10-29T21:19:35Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:43–12:31 on the 29th, 11:43–12:31 on the 30th.

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

  3. 03

    Rule

    Ṣaṣṭhī must be present during madhyāhna. It covers 48 of 48 minutes on the 29th and 0 of 48 on the 30th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104

  4. 04

    Tie-break

    Only one midday qualifies. No tie-break is needed.

    priority: unstated → only-day · margin 22686 s

  5. 05

    Ruling

    Sūrya Ṣaṣṭhī, Baoding, 1900: Monday 29 October.

    confidence: determinate

Say it like this

In Baoding, Sūrya Ṣaṣṭhī (Chhath) 1900 falls on Monday 29 October. Ṣaṣṭhī runs from 05:18 on Mon 29 Oct to 05:25 on Tue 30 Oct and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1900/surya-shashthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 29 Oct
Ahargaṇa, classicalDisc centre, no refractionMon 29 Oct
compat-drikpanchangComparison profileMon 29 Oct
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/surya-shashthi · ruleset 2026.3-draft

Month
Kārtika, amānta
Pakṣa · aṅga
Śukla · Ṣaṣṭhī
Kāla
Madhyāhna
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 104

“S 6 Nadi sasthi, Skanda sasthi (Madras), Surya sasthi, Chhat (Bihar).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceṢaṣṭhīMadhyāhna 28thCoveredMadhyāhna 29thCoveredRuled
Los Angeles13:13 → 13:2011:130 min11:1348 min29 Oct
Chicago15:13 → 15:2011:100 min11:1048 min29 Oct
Jersey City16:13 → 16:2011:160 min11:1648 min29 Oct
Port of Spain17:13 → 17:2011:260 min11:2648 min29 Oct
London21:13 → 21:2011:200 min11:2048 min29 Oct
Durban22:43 → 22:5010:460 min10:4648 min29 Oct
Dubai00:54 → 01:0111:200 min11:1948 min29 Oct
Delhi02:34 → 02:4111:320 min11:3248 min29 Oct
Kolkata02:34 → 02:4110:470 min10:4748 min29 Oct
Singapore04:08 → 04:1511:200 min11:1948 min29 Oct
Sydney07:13 → 07:2011:150 min11:1548 min29 Oct
Suva09:08 → 09:1511:210 min11:2148 min29 Oct
Profile · tradition
pac-rp@2026.1 · smarta
Rule
surya-shashthi@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

About Ahargaṇa