Ruling · Rudra Vrata · 1902

Wednesday 3 September

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 0 min 44 s away. Say “contested”.

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 Tuesday 2 September

Pratipadā is absent from madhyāhna. Not taken.

madhyāhna begins 11:54  12:42 madhyāhna ends
Pratipadā begins 13:19:15
11:0611:3011:5412:1812:4213:0613:30

0 of 48 minutes covered

Midday of Wednesday 3 September

Taken. The only midday Pratipadā reaches.

madhyāhna begins 11:53  12:41 madhyāhna ends
Pratipadā ends 11:54:11
11:0511:2911:5312:1712:4113:0513:29

1 of 48 minutes covered, the first 1

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

How it was decided

  1. 01

    Aṅga

    Pratipadā runs from 13:19 on Tue 2 Sep to 11:54 on Wed 3 Sep.

    1902-09-02T05:19:16Z → 1902-09-03T03:54:11Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:54–12:42 on the 2nd, 11:53–12:41 on the 3rd.

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

  3. 03

    Rule

    Pratipadā must be present during madhyāhna. It covers 0 of 48 minutes on the 2nd and 1 of 48 on the 3rd.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103

  4. 04

    Tie-break

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

    priority: purvaviddha → only-day · margin 44 s < 300 s

  5. 05

    Ruling

    Rudra Vrata, Baoding, 1902: Wednesday 3 September.

    confidence: boundary (margin)

Say it like this

In Baoding, Rudra Vrata 1902 falls on Wednesday 3 September. Pratipadā runs from 13:19 on Tue 2 Sep to 11:54 on Wed 3 Sep and covers 1 of 48 minutes of madhyāhna that midday. It is 0 min 44 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/1902/rudra-vrata · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 3 Sep
Ahargaṇa, classicalDisc centre, no refractionWed 3 Sep
compat-drikpanchangComparison profileTue 2 Sep
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/rudra-vrata · ruleset 2026.3-draft

Month
Bhādrapada, amānta
Pakṣa · aṅga
Śukla · Pratipadā
Kāla
Madhyāhna
Priority
Pūrvaviddhā
Tie-break
First day
Reference
CRC 1955, p. 103

“S 1 Rudra vrata (purvaviddha).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlacePratipadāMadhyāhna 2ndCoveredMadhyāhna 3rdCoveredRuled
Los Angeles21:19 → 19:5411:2848 min11:280 min2 Sep
Chicago23:19 → 21:5411:2648 min11:260 min2 Sep
Jersey City00:19 → 22:5411:3248 min11:310 min2 Sep
Port of Spain01:19 → 23:5411:4248 min11:410 min2 Sep
London05:19 → 03:5411:3648 min11:350 min2 Sep
Durban06:49 → 05:2411:0248 min11:020 min2 Sep
Dubai09:00 → 07:3511:3548 min11:350 min2 Sep
Delhi10:40 → 09:1511:4848 min11:470 min2 Sep
Kolkata10:40 → 09:1511:0348 min11:030 min2 Sep
Singapore12:14 → 10:4911:369 min11:350 min2 Sep
Sydney15:19 → 13:5411:310 min11:3148 min3 Sep
Suva17:14 → 15:4911:370 min11:3748 min3 Sep
Profile · tradition
pac-rp@2026.1 · smarta
Rule
rudra-vrata@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

About Ahargaṇa