Ruling · Rudra Vrata · 2057

Thursday 30 August

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 0 min 33 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 Thursday 30 August

Taken. The only midday Pratipadā reaches.

madhyāhna begins 11:55  12:43 madhyāhna ends
Pratipadā begins 11:55:04
11:0711:3111:5512:1912:4313:0713:31

47 of 48 minutes covered, the last 47

Midday of Friday 31 August

Pratipadā is absent from madhyāhna. Not taken.

madhyāhna begins 11:54  12:42 madhyāhna ends
Pratipadā ends 11:52:37
11:0611:3011:5412:1812:4213:0613:30

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 11:55 on Thu 30 Aug to 11:53 on Fri 31 Aug.

    2057-08-30T03:55:05Z → 2057-08-31T03:52:38Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:55–12:43 on the 30th, 11:54–12:42 on the 31st.

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

  3. 03

    Rule

    Pratipadā must be present during madhyāhna. It covers 47 of 48 minutes on the 30th and 0 of 48 on the 31st.

    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 33 s < 300 s

  5. 05

    Ruling

    Rudra Vrata, Baoding, 2057: Thursday 30 August.

    confidence: boundary (margin)

Say it like this

In Baoding, Rudra Vrata 2057 falls on Thursday 30 August. Pratipadā runs from 11:55 on Thu 30 Aug to 11:53 on Fri 31 Aug and covers 47 of 48 minutes of madhyāhna that midday. It is 0 min 33 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/2057/rudra-vrata · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 30 Aug
Ahargaṇa, classicalDisc centre, no refractionThu 30 Aug
compat-drikpanchangComparison profileThu 30 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 30thCoveredMadhyāhna 31stCoveredRuled
Los Angeles20:55 → 20:5312:2948 min12:290 min30 Aug
Chicago22:55 → 22:5312:2748 min12:260 min30 Aug
Jersey City23:55 → 23:5312:3348 min12:320 min30 Aug
Port of Spain23:55 → 23:5311:4348 min11:420 min30 Aug
London04:55 → 04:5312:3748 min12:360 min30 Aug
Durban05:55 → 05:5311:3348 min11:320 min30 Aug
Dubai07:55 → 07:5311:5548 min11:550 min30 Aug
Delhi09:25 → 09:2311:5848 min11:570 min30 Aug
Kolkata09:25 → 09:2311:1348 min11:130 min30 Aug
Singapore11:55 → 11:5312:4148 min12:410 min30 Aug
Sydney13:55 → 13:5311:320 min11:3248 min31 Aug
Suva15:55 → 15:5311:430 min11:4348 min31 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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