Ruling · Rudra Vrata · 2025

Saturday 23 August

Determinatein Ujjain, under the Rashtriya Panchang method. Clear of every threshold by 16 minutes.

Decide it for

UjjainDelhiKolkataSingaporeSydneyJersey City

23°11′ N 75°47′ E · Asia/Kolkata · GeoNames 1253914

The two middays

One ghaṭī is 24 minutes. Madhyāhna is 1 ghaṭikā either side of midday.

Midday of Saturday 23 August

Taken. The only midday Pratipadā reaches.

madhyāhna begins 12:05  12:53 madhyāhna ends
Pratipadā begins 11:36:33
11:1711:4112:0512:2912:5313:1713:41

48 of 48 minutes covered

Midday of Sunday 24 August

Pratipadā is absent from madhyāhna. Not taken.

madhyāhna begins 12:05  12:53 madhyāhna ends
Pratipadā ends 11:48:54
11:1711:4112:0512:2912:5313:1713:41

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 11:37 on Sat 23 Aug to 11:49 on Sun 24 Aug.

    2025-08-23T06:06:33Z → 2025-08-24T06:18:54Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:05–12:53 on the 23rd, 12:05–12:53 on the 24th.

    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 23rd and 0 of 48 on the 24th.

    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 972 s

  5. 05

    Ruling

    Rudra Vrata, Ujjain, 2025: Saturday 23 August.

    confidence: determinate

Say it like this

In Ujjain, Rudra Vrata 2025 falls on Saturday 23 August. Pratipadā runs from 11:37 on Sat 23 Aug to 11:49 on Sun 24 Aug and covers all of madhyāhna that midday.

ahargana.org/ujjain/festivals/2025/rudra-vrata · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 23 Aug
Ahargaṇa, classicalDisc centre, no refractionSat 23 Aug
compat-drikpanchangComparison profileSat 23 Aug
No institution has a recorded ruling for Ujjain.

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 23rdCoveredMadhyāhna 24thCoveredRuled
Los Angeles23:07 → 23:1912:3148 min12:310 min23 Aug
Chicago01:07 → 01:1912:2948 min12:280 min23 Aug
Jersey City02:07 → 02:1912:3448 min12:340 min23 Aug
Port of Spain02:07 → 02:1911:4548 min11:440 min23 Aug
London07:07 → 07:1912:3948 min12:380 min23 Aug
Durban08:07 → 08:1911:3548 min11:340 min23 Aug
Dubai10:07 → 10:1911:5748 min11:570 min23 Aug
Delhi11:37 → 11:4912:0048 min11:590 min23 Aug
Kolkata11:37 → 11:4911:1526 min11:1534 min23 Aug
Singapore14:07 → 14:1912:430 min12:4348 min24 Aug
Sydney16:07 → 16:1911:340 min11:3448 min24 Aug
Suva18:07 → 18:1911:450 min11:4548 min24 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