Ruling · Rudra Vrata · 1989

Friday 1 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 62 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 31 August

Pratipadā is absent from madhyāhna. Not taken.

madhyāhna begins 12:54  13:42 madhyāhna ends
12:0612:3012:5413:1813:4214:0614:30

0 of 48 minutes covered

Midday of Friday 1 September

Taken. The only midday Pratipadā reaches.

madhyāhna begins 12:54  13:42 madhyāhna ends
12:0612:3012:5413:1813:4214:0614:30

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 14:45 on Thu 31 Aug to 16:31 on Fri 1 Sep.

    1989-08-31T05:44:31Z → 1989-09-01T07:30:31Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:54–13:42 on the 31st, 12:54–13:42 on the 1st.

    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 31st and 48 of 48 on the 1st.

    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 3739 s

  5. 05

    Ruling

    Rudra Vrata, Baoding, 1989: Friday 1 September.

    confidence: determinate

Say it like this

In Baoding, Rudra Vrata 1989 falls on Friday 1 September. Pratipadā runs from 14:45 on Thu 31 Aug to 16:31 on Fri 1 Sep and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1989/rudra-vrata · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 1 Sep
Ahargaṇa, classicalDisc centre, no refractionFri 1 Sep
compat-drikpanchangComparison profileFri 1 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 31stCoveredMadhyāhna 1stCoveredRuled
Los Angeles22:45 → 00:3112:2948 min12:290 min31 Aug
Chicago00:45 → 02:3112:2648 min12:260 min31 Aug
Jersey City01:45 → 03:3112:3248 min12:320 min31 Aug
Port of Spain01:45 → 03:3111:4248 min11:420 min31 Aug
London06:45 → 08:3112:3648 min12:360 min31 Aug
Durban07:45 → 09:3111:3248 min11:320 min31 Aug
Dubai09:45 → 11:3111:5548 min11:550 min31 Aug
Delhi11:15 → 13:0111:5748 min11:5748 min31 Aug
Kolkata11:15 → 13:0111:1346 min11:1248 min31 Aug
Singapore13:45 → 15:3112:410 min12:4148 min1 Sep
Sydney15:45 → 17:3111:320 min11:3248 min1 Sep
Suva17:45 → 19:3111:430 min11:4348 min1 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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