Ruling · Rudra Vrata · 1921

Friday 2 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 21 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 Friday 2 September

Taken. The only midday Pratipadā reaches.

madhyāhna begins 11:54  12:42 madhyāhna ends
Pratipadā begins 11:32:38
11:0611:3011:5412:1812:4213:0613:30

48 of 48 minutes covered

Midday of Saturday 3 September

Pratipadā is absent from madhyāhna. Not taken.

madhyāhna begins 11:53  12:41 madhyāhna ends
11:0511:2911:5312:1712:4113:0513:29

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 11:33 on Fri 2 Sep to 08:02 on Sat 3 Sep.

    1921-09-02T03:32:38Z → 1921-09-03T00:02:27Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:54–12:42 on the 2nd, 11:53–12:41 on the 3rd.

    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 2nd and 0 of 48 on the 3rd.

    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 1261 s

  5. 05

    Ruling

    Rudra Vrata, Baoding, 1921: Friday 2 September.

    confidence: determinate

Say it like this

In Baoding, Rudra Vrata 1921 falls on Friday 2 September. Pratipadā runs from 11:33 on Fri 2 Sep to 08:02 on Sat 3 Sep and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1921/rudra-vrata · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 2 Sep
Ahargaṇa, classicalDisc centre, no refractionFri 2 Sep
compat-drikpanchangComparison profileFri 2 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 2ndCoveredMadhyāhna 3rdCoveredRuled
Los Angeles19:33 → 16:0211:2848 min11:280 min2 Sep
Chicago22:33 → 19:0212:2648 min12:260 min2 Sep
Jersey City23:33 → 20:0212:3248 min12:310 min2 Sep
Port of Spain23:33 → 20:0211:4248 min11:410 min2 Sep
London04:33 → 01:0212:3648 min12:350 min2 Sep
Durban05:33 → 02:0211:3248 min11:320 min2 Sep
Dubai07:33 → 04:0211:5448 min11:540 min2 Sep
Delhi09:03 → 05:3211:5748 min11:560 min2 Sep
Kolkata09:03 → 05:3211:1248 min11:120 min2 Sep
Singapore10:33 → 07:0211:4048 min11:400 min2 Sep
Sydney13:33 → 10:0211:310 min11:310 min3 Sep
Suva15:33 → 12:0211:420 min11:4220 min3 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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