Ruling · Rudra Vrata · 2015

Monday 14 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 123 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 Sunday 13 September

Pratipadā is absent from madhyāhna. Not taken.

madhyāhna begins 11:50  12:38 madhyāhna ends
11:0211:2611:5012:1412:3813:0213:26

0 of 48 minutes covered

Midday of Monday 14 September

Taken. The only midday Pratipadā reaches.

madhyāhna begins 11:50  12:38 madhyāhna ends
11:0211:2611:5012:1412:3813:0213:26

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 14:41 on Sun 13 Sep to 17:19 on Mon 14 Sep.

    2015-09-13T06:41:16Z → 2015-09-14T09:18:38Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:50–12:38 on the 13th, 11:50–12:38 on the 14th.

    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 13th and 48 of 48 on the 14th.

    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 7399 s

  5. 05

    Ruling

    Rudra Vrata, Baoding, 2015: Monday 14 September.

    confidence: determinate

Say it like this

In Baoding, Rudra Vrata 2015 falls on Monday 14 September. Pratipadā runs from 14:41 on Sun 13 Sep to 17:19 on Mon 14 Sep and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2015/rudra-vrata · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 14 Sep
Ahargaṇa, classicalDisc centre, no refractionMon 14 Sep
compat-drikpanchangComparison profileMon 14 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 13thCoveredMadhyāhna 14thCoveredRuled
Los Angeles23:41 → 02:1912:2548 min12:240 min13 Sep
Chicago01:41 → 04:1912:2248 min12:220 min13 Sep
Jersey City02:41 → 05:1912:2848 min12:280 min13 Sep
Port of Spain02:41 → 05:1911:3848 min11:380 min13 Sep
London07:41 → 10:1912:3248 min12:320 min13 Sep
Durban08:41 → 11:1911:2848 min11:280 min13 Sep
Dubai10:41 → 13:1911:5148 min11:5048 min13 Sep
Delhi12:11 → 14:4911:5330 min11:5348 min13 Sep
Kolkata12:11 → 14:4911:080 min11:0848 min14 Sep
Singapore14:41 → 17:1912:370 min12:3648 min14 Sep
Sydney16:41 → 19:1911:280 min11:2748 min14 Sep
Suva18:41 → 21:1911:390 min11:3848 min14 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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