Ruling · Vivasvat Saptamī · 1906

Thursday 28 June

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 1 min 23 s away. Say “contested”.

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 Thursday 28 June

Taken. The only midday Saptamī reaches.

madhyāhna begins 11:57  12:45 madhyāhna ends
Saptamī begins 11:58:14
11:0911:3311:5712:2112:4513:0913:33

47 of 48 minutes covered, the last 47

Midday of Friday 29 June

Saptamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:57  12:45 madhyāhna ends
11:0911:3311:5712:2112:4513:0913:33

0 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Saptamī runs from 11:58 on Thu 28 Jun to 11:01 on Fri 29 Jun.

    1906-06-28T03:58:15Z → 1906-06-29T03:00:40Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:57–12:45 on the 28th, 11:57–12:45 on the 29th.

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

  3. 03

    Rule

    Saptamī must be present during madhyāhna. It covers 47 of 48 minutes on the 28th and 0 of 48 on the 29th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102

  4. 04

    Tie-break

    Only one midday qualifies. No tie-break is needed.

    priority: purvaviddha → only-day · margin 83 s < 300 s

  5. 05

    Ruling

    Vivasvat Saptamī, Baoding, 1906: Thursday 28 June.

    confidence: boundary (margin)

Say it like this

In Baoding, Vivasvat Saptamī 1906 falls on Thursday 28 June. Saptamī runs from 11:58 on Thu 28 Jun to 11:01 on Fri 29 Jun and covers 47 of 48 minutes of madhyāhna that midday. It is 1 min 23 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/1906/vivasvat-saptami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 28 Jun
Ahargaṇa, classicalDisc centre, no refractionThu 28 Jun
compat-drikpanchangComparison profileThu 28 Jun
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/vivasvat-saptami · ruleset 2026.3-draft

Month
Āṣāḍha, amānta
Pakṣa · aṅga
Śukla · Saptamī
Kāla
Madhyāhna
Priority
Pūrvaviddhā
Tie-break
First day
Reference
CRC 1955, p. 102

“S 7 Vivasvat saptami (purvaviddha).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceSaptamīMadhyāhna 28thCoveredMadhyāhna 29thCoveredRuled
Los Angeles19:58 → 19:0111:3248 min11:320 min28 Jun
Chicago21:58 → 21:0111:2948 min11:300 min28 Jun
Jersey City22:58 → 22:0111:3548 min11:350 min28 Jun
Port of Spain23:58 → 23:0111:4548 min11:450 min28 Jun
London03:58 → 03:0111:3948 min11:390 min28 Jun
Durban05:58 → 05:0111:3548 min11:350 min28 Jun
Dubai07:39 → 06:4211:3948 min11:390 min28 Jun
Delhi09:28 → 08:3112:0048 min12:000 min28 Jun
Kolkata09:28 → 08:3111:1548 min11:160 min28 Jun
Singapore10:58 → 10:0111:4348 min11:440 min28 Jun
Sydney13:58 → 13:0111:340 min11:3448 min29 Jun
Suva15:53 → 14:5611:400 min11:4048 min29 Jun
Profile · tradition
pac-rp@2026.1 · smarta
Rule
vivasvat-saptami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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