Ruling · Vāmana Jayantī · 2013

Monday 16 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 429 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 16 September

Taken. The only midday Dvādaśī reaches.

madhyāhna begins 11:49  12:37 madhyāhna ends
11:0111:2511:4912:1312:3713:0113:25

48 of 48 minutes covered

Midday of Tuesday 17 September

Dvādaśī is absent from madhyāhna. Not taken.

madhyāhna begins 11:48  12:36 madhyāhna ends
11:0011:2411:4812:1212:3613:0013:24

0 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Dvādaśī runs from 04:39 on Mon 16 Sep to 02:01 on Tue 17 Sep.

    2013-09-15T20:39:27Z → 2013-09-16T18:01:00Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:49–12:37 on the 16th, 11:48–12:36 on the 17th.

    madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Dvādaśī must be present during madhyāhna. It covers 48 of 48 minutes on the 16th and 0 of 48 on the 17th.

    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: unstated → only-day · margin 25757 s

  5. 05

    Ruling

    Vāmana Jayantī, Baoding, 2013: Monday 16 September.

    confidence: determinate

Say it like this

In Baoding, Vāmana Jayantī 2013 falls on Monday 16 September. Dvādaśī runs from 04:39 on Mon 16 Sep to 02:01 on Tue 17 Sep and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2013/vamana-jayanti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 16 Sep
Ahargaṇa, classicalDisc centre, no refractionMon 16 Sep
compat-drikpanchangComparison profileMon 16 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/vamana-jayanti · ruleset 2026.3-draft

Month
Bhādrapada, amānta
Pakṣa · aṅga
Śukla · Dvādaśī
Kāla
Madhyāhna
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 103

“S 12 Visnuparivartanotsava, Sakrotthana (in any of the naksatras U. Asadha, Sravana & Dhanistha), Kalki dvadasi, Sravana dvadasi (when combined with naksatra Sravana), Vamana jayanti (madhyahna vyapini).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceDvādaśīMadhyāhna 15thCoveredMadhyāhna 16thCoveredRuled
Los Angeles13:39 → 11:0112:240 min12:230 min16 Sep
Chicago15:39 → 13:0112:210 min12:2140 min16 Sep
Jersey City16:39 → 14:0112:270 min12:2748 min16 Sep
Port of Spain16:39 → 14:0111:370 min11:3748 min16 Sep
London21:39 → 19:0112:310 min12:3148 min16 Sep
Durban22:39 → 20:0111:270 min11:2748 min16 Sep
Dubai00:39 → 22:0111:500 min11:4948 min16 Sep
Delhi02:09 → 23:3111:520 min11:5248 min16 Sep
Kolkata02:09 → 23:3111:080 min11:0748 min16 Sep
Singapore04:39 → 02:0112:360 min12:3548 min16 Sep
Sydney06:39 → 04:0111:270 min11:2648 min16 Sep
Suva08:39 → 06:0111:380 min11:3748 min16 Sep
Profile · tradition
pac-rp@2026.1 · smarta
Rule
vamana-jayanti@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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