Ruling · Rudra Vrata · 1909

Wednesday 15 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 618 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 Wednesday 15 September

Taken. The only midday Pratipadā reaches.

madhyāhna begins 11:49  12:37 madhyāhna ends
11:0111:2511:4912:1312:3713:0113:25

48 of 48 minutes covered

Midday of Thursday 16 September

Pratipadā is absent from madhyāhna. Not taken.

madhyāhna begins 11:49  12:37 madhyāhna ends
11:0111:2511:4912:1312:3713:0113:25

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 23:08 on Tue 14 Sep to 01:31 on Thu 16 Sep.

    1909-09-14T15:08:29Z → 1909-09-15T17:30:42Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:49–12:37 on the 15th, 11:49–12:37 on the 16th.

    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 15th and 0 of 48 on the 16th.

    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 37094 s

  5. 05

    Ruling

    Rudra Vrata, Baoding, 1909: Wednesday 15 September.

    confidence: determinate

Say it like this

In Baoding, Rudra Vrata 1909 falls on Wednesday 15 September. Pratipadā runs from 23:08 on Tue 14 Sep to 01:31 on Thu 16 Sep and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1909/rudra-vrata · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 15 Sep
Ahargaṇa, classicalDisc centre, no refractionWed 15 Sep
compat-drikpanchangComparison profileWed 15 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 14thCoveredMadhyāhna 15thCoveredRuled
Los Angeles07:08 → 09:3111:2448 min11:240 min14 Sep
Chicago09:08 → 11:3111:2248 min11:219 min14 Sep
Jersey City10:08 → 12:3111:2848 min11:2748 min14 Sep
Port of Spain11:08 → 13:3111:3848 min11:3748 min14 Sep
London15:08 → 17:3111:320 min11:3148 min15 Sep
Durban17:08 → 19:3111:280 min11:2748 min15 Sep
Dubai18:49 → 21:1211:310 min11:3148 min15 Sep
Delhi20:38 → 23:0111:530 min11:5248 min15 Sep
Kolkata20:38 → 23:0111:080 min11:0848 min15 Sep
Singapore22:08 → 00:3111:360 min11:3648 min15 Sep
Sydney01:08 → 03:3111:270 min11:2748 min15 Sep
Suva03:03 → 05:2611:330 min11:3348 min15 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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