Ruling · Vāmana Jayantī · 2021

Friday 17 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 70 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 Friday 17 September

Taken. The only midday Dvādaśī reaches.

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

48 of 48 minutes covered

Midday of Saturday 18 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 10:38 on Fri 17 Sep to 09:25 on Sat 18 Sep.

    2021-09-17T02:38:13Z → 2021-09-18T01:24:52Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:48–12:36 on the 17th, 11:48–12:36 on the 18th.

    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 17th and 0 of 48 on the 18th.

    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 4209 s

  5. 05

    Ruling

    Vāmana Jayantī, Baoding, 2021: Friday 17 September.

    confidence: determinate

Say it like this

In Baoding, Vāmana Jayantī 2021 falls on Friday 17 September. Dvādaśī runs from 10:38 on Fri 17 Sep to 09:25 on Sat 18 Sep and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2021/vamana-jayanti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 17 Sep
Ahargaṇa, classicalDisc centre, no refractionFri 17 Sep
compat-drikpanchangComparison profileFri 17 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 17thCoveredMadhyāhna 18thCoveredRuled
Los Angeles19:38 → 18:2512:2348 min12:230 min17 Sep
Chicago21:38 → 20:2512:2148 min12:200 min17 Sep
Jersey City22:38 → 21:2512:2648 min12:260 min17 Sep
Port of Spain22:38 → 21:2511:3648 min11:360 min17 Sep
London03:38 → 02:2512:3048 min12:300 min17 Sep
Durban04:38 → 03:2511:2748 min11:260 min17 Sep
Dubai06:38 → 05:2511:4948 min11:490 min17 Sep
Delhi08:08 → 06:5511:5148 min11:510 min17 Sep
Kolkata08:08 → 06:5511:0748 min11:070 min17 Sep
Singapore10:38 → 09:2512:3548 min12:350 min17 Sep
Sydney12:38 → 11:2511:260 min11:260 min18 Sep
Suva14:38 → 13:2511:370 min11:3748 min18 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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