Ruling · Rudra Vrata · 1949

Wednesday 24 August

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 2 min 46 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 Wednesday 24 August

Taken. The only midday Pratipadā reaches.

madhyāhna begins 11:56  12:44 madhyāhna ends
Pratipadā begins 11:59:00
11:0811:3211:5612:2012:4413:0813:32

45 of 48 minutes covered, the last 45

Midday of Thursday 25 August

Pratipadā is absent from madhyāhna. Not taken.

madhyāhna begins 11:56  12:44 madhyāhna ends
11:0811:3211:5612:2012:4413:0813:32

0 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Pratipadā runs from 11:59 on Wed 24 Aug to 08:46 on Thu 25 Aug.

    1949-08-24T03:59:01Z → 1949-08-25T00:46:05Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:56–12:44 on the 24th, 11:56–12:44 on the 25th.

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

  3. 03

    Rule

    Pratipadā must be present during madhyāhna. It covers 45 of 48 minutes on the 24th and 0 of 48 on the 25th.

    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 166 s < 300 s

  5. 05

    Ruling

    Rudra Vrata, Baoding, 1949: Wednesday 24 August.

    confidence: boundary (margin)

Say it like this

In Baoding, Rudra Vrata 1949 falls on Wednesday 24 August. Pratipadā runs from 11:59 on Wed 24 Aug to 08:46 on Thu 25 Aug and covers 45 of 48 minutes of madhyāhna that midday. It is 2 min 46 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/1949/rudra-vrata · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 24 Aug
Ahargaṇa, classicalDisc centre, no refractionWed 24 Aug
compat-drikpanchangComparison profileWed 24 Aug
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 24thCoveredMadhyāhna 25thCoveredRuled
Los Angeles19:59 → 16:4611:3148 min11:310 min24 Aug
Chicago22:59 → 19:4612:2948 min12:280 min24 Aug
Jersey City23:59 → 20:4612:3448 min12:340 min24 Aug
Port of Spain23:59 → 20:4611:4448 min11:440 min24 Aug
London04:59 → 01:4612:3848 min12:380 min24 Aug
Durban05:59 → 02:4611:3448 min11:340 min24 Aug
Dubai07:59 → 04:4611:5748 min11:570 min24 Aug
Delhi09:29 → 06:1611:5948 min11:590 min24 Aug
Kolkata09:29 → 06:1611:1548 min11:150 min24 Aug
Singapore11:29 → 08:1612:1348 min12:130 min24 Aug
Sydney13:59 → 10:4611:340 min11:340 min25 Aug
Suva15:59 → 12:4611:450 min11:4548 min25 Aug
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

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