Ruling · Rudra Vrata · 2091

Friday 14 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 108 minutes.

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 13 September

Pratipadā is absent from madhyāhna. Not taken.

madhyāhna begins 11:50  12:38 madhyāhna ends
11:0211:2611:5012:1412:3813:0213:26

0 of 48 minutes covered

Midday of Friday 14 September

Taken. The only midday Pratipadā reaches.

madhyāhna begins 11:50  12:38 madhyāhna ends
11:0211:2611:5012:1412:3813:0213:26

48 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 17:36 on Thu 13 Sep to 14:26 on Fri 14 Sep.

    2091-09-13T09:36:14Z → 2091-09-14T06:25:36Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:50–12:38 on the 13th, 11:50–12:38 on the 14th.

    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 13th and 48 of 48 on the 14th.

    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 6470 s

  5. 05

    Ruling

    Rudra Vrata, Baoding, 2091: Friday 14 September.

    confidence: determinate

Say it like this

In Baoding, Rudra Vrata 2091 falls on Friday 14 September. Pratipadā runs from 17:36 on Thu 13 Sep to 14:26 on Fri 14 Sep and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2091/rudra-vrata · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 14 Sep
Ahargaṇa, classicalDisc centre, no refractionFri 14 Sep
compat-drikpanchangComparison profileFri 14 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 13thCoveredMadhyāhna 14thCoveredRuled
Los Angeles02:36 → 23:2612:2548 min12:240 min13 Sep
Chicago04:36 → 01:2612:2248 min12:220 min13 Sep
Jersey City05:36 → 02:2612:2848 min12:280 min13 Sep
Port of Spain05:36 → 02:2611:3848 min11:380 min13 Sep
London10:36 → 07:2612:3248 min12:320 min13 Sep
Durban11:36 → 08:2611:2840 min11:280 min13 Sep
Dubai13:36 → 10:2611:510 min11:500 min14 Sep
Delhi15:06 → 11:5611:530 min11:533 min14 Sep
Kolkata15:06 → 11:5611:090 min11:0847 min14 Sep
Singapore17:36 → 14:2612:370 min12:3748 min14 Sep
Sydney19:36 → 16:2611:280 min11:2748 min14 Sep
Suva21:36 → 18:2611:390 min11:3848 min14 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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