Ruling · Vāmana Jayantī · 2030

Sunday 8 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 61 minutes.

Decide it for

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 8 September

Taken. The only midday Dvādaśī reaches.

madhyāhna begins 11:52  12:40 madhyāhna ends
11:0411:2811:5212:1612:4013:0413:28

48 of 48 minutes covered

Midday of Monday 9 September

Dvādaśī 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

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

How it was decided

  1. 01

    Aṅga

    Dvādaśī runs from 10:51 on Sun 8 Sep to 09:03 on Mon 9 Sep.

    2030-09-08T02:51:07Z → 2030-09-09T01:02:57Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:52–12:40 on the 8th, 11:51–12:39 on the 9th.

    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 8th and 0 of 48 on the 9th.

    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 3630 s

  5. 05

    Ruling

    Vāmana Jayantī, Baoding, 2030: Sunday 8 September.

    confidence: determinate

Say it like this

In Baoding, Vāmana Jayantī 2030 falls on Sunday 8 September. Dvādaśī runs from 10:51 on Sun 8 Sep to 09:03 on Mon 9 Sep and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2030/vamana-jayanti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 8 Sep
Ahargaṇa, classicalDisc centre, no refractionSun 8 Sep
compat-drikpanchangComparison profileSun 8 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 8thCoveredMadhyāhna 9thCoveredRuled
Los Angeles19:51 → 18:0312:2648 min12:260 min8 Sep
Chicago21:51 → 20:0312:2448 min12:230 min8 Sep
Jersey City22:51 → 21:0312:3048 min12:290 min8 Sep
Port of Spain22:51 → 21:0311:4048 min11:390 min8 Sep
London03:51 → 02:0312:3448 min12:330 min8 Sep
Durban04:51 → 03:0311:3048 min11:290 min8 Sep
Dubai06:51 → 05:0311:5248 min11:520 min8 Sep
Delhi08:21 → 06:3311:5548 min11:540 min8 Sep
Kolkata08:21 → 06:3311:1048 min11:100 min8 Sep
Singapore10:51 → 09:0312:3848 min12:380 min8 Sep
Sydney12:51 → 11:0311:290 min11:290 min9 Sep
Suva14:51 → 13:0311:400 min11:4048 min9 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

About Ahargaṇa