Ruling · Sūrya Ṣaṣṭhī (Chhath) · 2025

Monday 27 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 67 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 27 October

Taken. The only midday Ṣaṣṭhī reaches.

madhyāhna begins 11:38  12:26 madhyāhna ends
10:5011:1411:3812:0212:2612:5013:14

48 of 48 minutes covered

Midday of Tuesday 28 October

Ṣaṣṭhī is absent from madhyāhna. Not taken.

madhyāhna begins 11:38  12:26 madhyāhna ends
10:5011:1411:3812:0212:2612:5013:14

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 08:35 on Mon 27 Oct to 10:30 on Tue 28 Oct.

    2025-10-27T00:35:25Z → 2025-10-28T02:30:16Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:38–12:26 on the 27th, 11:38–12:26 on the 28th.

    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 27th and 0 of 48 on the 28th.

    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 4046 s

  5. 05

    Ruling

    Sūrya Ṣaṣṭhī, Baoding, 2025: Monday 27 October.

    confidence: determinate

Say it like this

In Baoding, Sūrya Ṣaṣṭhī (Chhath) 2025 falls on Monday 27 October. Ṣaṣṭhī runs from 08:35 on Mon 27 Oct to 10:30 on Tue 28 Oct and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2025/surya-shashthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 27 Oct
Ahargaṇa, classicalDisc centre, no refractionMon 27 Oct
compat-drikpanchangComparison profileMon 27 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 27thCoveredMadhyāhna 28thCoveredRuled
Los Angeles17:35 → 19:3012:1348 min12:130 min27 Oct
Chicago19:35 → 21:3012:1048 min12:100 min27 Oct
Jersey City20:35 → 22:3012:1648 min12:160 min27 Oct
Port of Spain20:35 → 22:3011:2648 min11:260 min27 Oct
London00:35 → 02:3011:2048 min11:200 min27 Oct
Durban02:35 → 04:3011:1648 min11:160 min27 Oct
Dubai04:35 → 06:3011:3848 min11:380 min27 Oct
Delhi06:05 → 08:0011:4148 min11:410 min27 Oct
Kolkata06:05 → 08:0010:5648 min10:560 min27 Oct
Singapore08:35 → 10:3012:2448 min12:240 min27 Oct
Sydney11:35 → 13:3012:1548 min12:1548 min27 Oct
Suva12:35 → 14:3011:260 min11:2648 min28 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