Ruling · Vāmana Jayantī · 2018

Friday 21 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 336 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 21 September

Taken. The only midday Dvādaśī reaches.

madhyāhna begins 11:47  12:35 madhyāhna ends
10:5911:2311:4712:1112:3512:5913:23

48 of 48 minutes covered

Midday of Saturday 22 September

Dvādaśī is absent from madhyāhna. Not taken.

madhyāhna begins 11:47  12:35 madhyāhna ends
10:5911:2311:4712:1112:3512:5913:23

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 03:47 on Fri 21 Sep to 06:11 on Sat 22 Sep.

    2018-09-20T19:46:32Z → 2018-09-21T22:11:01Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:47–12:35 on the 21st, 11:47–12:35 on the 22nd.

    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 21st and 0 of 48 on the 22nd.

    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 20139 s

  5. 05

    Ruling

    Vāmana Jayantī, Baoding, 2018: Friday 21 September.

    confidence: determinate

Say it like this

In Baoding, Vāmana Jayantī 2018 falls on Friday 21 September. Dvādaśī runs from 03:47 on Fri 21 Sep to 06:11 on Sat 22 Sep and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2018/vamana-jayanti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 21 Sep
Ahargaṇa, classicalDisc centre, no refractionFri 21 Sep
compat-drikpanchangComparison profileFri 21 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 20thCoveredMadhyāhna 21stCoveredRuled
Los Angeles12:47 → 15:1112:2223 min12:2248 min21 Sep
Chicago14:47 → 17:1112:200 min12:1948 min21 Sep
Jersey City15:47 → 18:1112:250 min12:2548 min21 Sep
Port of Spain15:47 → 18:1111:350 min11:3548 min21 Sep
London20:47 → 23:1112:290 min12:2948 min21 Sep
Durban21:47 → 00:1111:260 min11:2548 min21 Sep
Dubai23:47 → 02:1111:480 min11:4848 min21 Sep
Delhi01:17 → 03:4111:500 min11:5048 min21 Sep
Kolkata01:17 → 03:4111:060 min11:0648 min21 Sep
Singapore03:47 → 06:1112:340 min12:3448 min21 Sep
Sydney05:47 → 08:1111:250 min11:2548 min21 Sep
Suva07:47 → 10:1111:360 min11:3648 min21 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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