Ruling · Rudra Vrata · 1913

Monday 1 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 436 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 1 September

Taken. The only midday Pratipadā reaches.

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

48 of 48 minutes covered

Midday of Tuesday 2 September

Pratipadā is absent from madhyāhna. Not taken.

madhyāhna begins 11:54  12:42 madhyāhna ends
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 04:38 on Mon 1 Sep to 00:54 on Tue 2 Sep.

    1913-08-31T20:37:47Z → 1913-09-01T16:53:56Z

  2. 02

    Kāla

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

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

  3. 03

    Rule

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

    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 26173 s

  5. 05

    Ruling

    Rudra Vrata, Baoding, 1913: Monday 1 September.

    confidence: determinate

Say it like this

In Baoding, Rudra Vrata 1913 falls on Monday 1 September. Pratipadā runs from 04:38 on Mon 1 Sep to 00:54 on Tue 2 Sep and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1913/rudra-vrata · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 1 Sep
Ahargaṇa, classicalDisc centre, no refractionMon 1 Sep
compat-drikpanchangComparison profileMon 1 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 31stCoveredMadhyāhna 1stCoveredRuled
Los Angeles12:38 → 08:5411:290 min11:290 min1 Sep
Chicago14:38 → 10:5411:270 min11:260 min1 Sep
Jersey City15:38 → 11:5411:320 min11:3222 min1 Sep
Port of Spain16:38 → 12:5411:420 min11:4248 min1 Sep
London20:38 → 16:5411:360 min11:3648 min1 Sep
Durban22:38 → 18:5411:320 min11:3248 min1 Sep
Dubai00:19 → 20:3511:360 min11:3648 min1 Sep
Delhi02:08 → 22:2411:570 min11:5748 min1 Sep
Kolkata02:08 → 22:2411:130 min11:1348 min1 Sep
Singapore03:38 → 23:5411:410 min11:4148 min1 Sep
Sydney06:38 → 02:5411:320 min11:3248 min1 Sep
Suva08:33 → 04:4911:380 min11:3848 min1 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

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