Ruling · Rudra Vrata · 1950

Tuesday 12 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 21 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 Tuesday 12 September

Taken. The only midday Pratipadā reaches.

madhyāhna begins 11:50  12:38 madhyāhna ends
Pratipadā begins 11:28:52
11:0211:2611:5012:1412:3813:0213:26

48 of 48 minutes covered

Midday of Wednesday 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

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

How it was decided

  1. 01

    Aṅga

    Pratipadā runs from 11:29 on Tue 12 Sep to 09:18 on Wed 13 Sep.

    1950-09-12T03:28:53Z → 1950-09-13T01:18:21Z

  2. 02

    Kāla

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

    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 12th and 0 of 48 on the 13th.

    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 1289 s

  5. 05

    Ruling

    Rudra Vrata, Baoding, 1950: Tuesday 12 September.

    confidence: determinate

Say it like this

In Baoding, Rudra Vrata 1950 falls on Tuesday 12 September. Pratipadā runs from 11:29 on Tue 12 Sep to 09:18 on Wed 13 Sep and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1950/rudra-vrata · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 12 Sep
Ahargaṇa, classicalDisc centre, no refractionTue 12 Sep
compat-drikpanchangComparison profileTue 12 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 12thCoveredMadhyāhna 13thCoveredRuled
Los Angeles20:29 → 18:1812:2548 min12:250 min12 Sep
Chicago22:29 → 20:1812:2348 min12:220 min12 Sep
Jersey City23:29 → 21:1812:2848 min12:280 min12 Sep
Port of Spain23:29 → 21:1811:3848 min11:380 min12 Sep
London04:29 → 02:1812:3248 min12:320 min12 Sep
Durban05:29 → 03:1811:2948 min11:280 min12 Sep
Dubai07:29 → 05:1811:5148 min11:510 min12 Sep
Delhi08:59 → 06:4811:5348 min11:530 min12 Sep
Kolkata08:59 → 06:4811:0948 min11:090 min12 Sep
Singapore10:59 → 08:4812:0748 min12:070 min12 Sep
Sydney13:29 → 11:1811:280 min11:280 min13 Sep
Suva15:29 → 13:1811:390 min11:3948 min13 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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