Ruling · Rudra Vrata · 1980

Wednesday 10 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 321 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 9 September

Pratipadā is absent from madhyāhna. Not taken.

madhyāhna begins 11:51  12:39 madhyāhna ends
11:0311:2711:5112:1512:3913:0313:27

0 of 48 minutes covered

Midday of Wednesday 10 September

Taken. The only midday Pratipadā reaches.

madhyāhna begins 11:51  12:39 madhyāhna ends
11:0311:2711:5112:1512:3913:0313:27

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 18:00 on Tue 9 Sep to 20:14 on Wed 10 Sep.

    1980-09-09T10:00:11Z → 1980-09-10T12:13:33Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:51–12:39 on the 9th, 11:51–12:39 on the 10th.

    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 9th and 48 of 48 on the 10th.

    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 19262 s

  5. 05

    Ruling

    Rudra Vrata, Baoding, 1980: Wednesday 10 September.

    confidence: determinate

Say it like this

In Baoding, Rudra Vrata 1980 falls on Wednesday 10 September. Pratipadā runs from 18:00 on Tue 9 Sep to 20:14 on Wed 10 Sep and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1980/rudra-vrata · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 10 Sep
Ahargaṇa, classicalDisc centre, no refractionWed 10 Sep
compat-drikpanchangComparison profileWed 10 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 9thCoveredMadhyāhna 10thCoveredRuled
Los Angeles03:00 → 05:1412:2648 min12:250 min9 Sep
Chicago05:00 → 07:1412:2348 min12:230 min9 Sep
Jersey City06:00 → 08:1412:2948 min12:290 min9 Sep
Port of Spain06:00 → 08:1411:3948 min11:390 min9 Sep
London11:00 → 13:1412:3348 min12:3341 min9 Sep
Durban12:00 → 14:1411:2917 min11:2948 min9 Sep
Dubai14:00 → 16:1411:520 min11:5248 min10 Sep
Delhi15:30 → 17:4411:540 min11:5448 min10 Sep
Kolkata15:30 → 17:4411:100 min11:0948 min10 Sep
Singapore17:30 → 19:4412:080 min12:0848 min10 Sep
Sydney20:00 → 22:1411:290 min11:2848 min10 Sep
Suva22:00 → 00:1411:400 min11:3948 min10 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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