Ruling · Rudra Vrata · 1990

Tuesday 21 August

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 423 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 Monday 20 August

Pratipadā is absent from madhyāhna. Not taken.

madhyāhna begins 12:57  13:45 madhyāhna ends
12:0912:3312:5713:2113:4514:0914:33

0 of 48 minutes covered

Midday of Tuesday 21 August

Taken. The only midday Pratipadā reaches.

madhyāhna begins 12:57  13:45 madhyāhna ends
12:0912:3312:5713:2113:4514:0914:33

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 21:39 on Mon 20 Aug to 20:48 on Tue 21 Aug.

    1990-08-20T12:39:00Z → 1990-08-21T11:47:40Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:57–13:45 on the 20th, 12:57–13:45 on the 21st.

    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 20th and 48 of 48 on the 21st.

    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 25354 s

  5. 05

    Ruling

    Rudra Vrata, Baoding, 1990: Tuesday 21 August.

    confidence: determinate

Say it like this

In Baoding, Rudra Vrata 1990 falls on Tuesday 21 August. Pratipadā runs from 21:39 on Mon 20 Aug to 20:48 on Tue 21 Aug and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1990/rudra-vrata · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 21 Aug
Ahargaṇa, classicalDisc centre, no refractionTue 21 Aug
compat-drikpanchangComparison profileTue 21 Aug
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 20thCoveredMadhyāhna 21stCoveredRuled
Los Angeles05:39 → 04:4812:3248 min12:320 min20 Aug
Chicago07:39 → 06:4812:3048 min12:290 min20 Aug
Jersey City08:39 → 07:4812:3548 min12:350 min20 Aug
Port of Spain08:39 → 07:4811:4548 min11:450 min20 Aug
London13:39 → 12:4812:390 min12:399 min21 Aug
Durban14:39 → 13:4811:360 min11:3548 min21 Aug
Dubai16:39 → 15:4811:580 min11:5848 min21 Aug
Delhi18:09 → 17:1812:000 min12:0048 min21 Aug
Kolkata18:09 → 17:1811:160 min11:1648 min21 Aug
Singapore20:39 → 19:4812:440 min12:4448 min21 Aug
Sydney22:39 → 21:4811:350 min11:3548 min21 Aug
Suva00:39 → 23:4811:460 min11:4648 min21 Aug
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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