Ruling · Rudra Vrata · 2018

Monday 10 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 589 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 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

Midday of Tuesday 11 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

Pratipadā presentMadhyāhna, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Pratipadā runs from 02:01 on Mon 10 Sep to 23:06 on Mon 10 Sep.

    2018-09-09T18:01:28Z → 2018-09-10T15:05:46Z

  2. 02

    Kāla

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

    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 10th and 0 of 48 on the 11th.

    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 35367 s

  5. 05

    Ruling

    Rudra Vrata, Baoding, 2018: Monday 10 September.

    confidence: determinate

Say it like this

In Baoding, Rudra Vrata 2018 falls on Monday 10 September. Pratipadā runs from 02:01 on Mon 10 Sep to 23:06 on Mon 10 Sep and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2018/rudra-vrata · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 10 Sep
Ahargaṇa, classicalDisc centre, no refractionMon 10 Sep
compat-drikpanchangComparison profileMon 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 Angeles11:01 → 08:0612:2648 min12:260 min9 Sep
Chicago13:01 → 10:0612:2310 min12:230 min9 Sep
Jersey City14:01 → 11:0612:290 min12:290 min10 Sep
Port of Spain14:01 → 11:0611:390 min11:390 min10 Sep
London19:01 → 16:0612:330 min12:3348 min10 Sep
Durban20:01 → 17:0611:290 min11:2948 min10 Sep
Dubai22:01 → 19:0611:520 min11:5248 min10 Sep
Delhi23:31 → 20:3611:540 min11:5448 min10 Sep
Kolkata23:31 → 20:3611:100 min11:0948 min10 Sep
Singapore02:01 → 23:0612:380 min12:3848 min10 Sep
Sydney04:01 → 01:0611:290 min11:2948 min10 Sep
Suva06:01 → 03:0611:400 min11:4048 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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