Ruling · Vivasvat Saptamī · 1913

Thursday 10 July

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 348 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 Wednesday 9 July

Saptamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:59  12:47 madhyāhna ends
11:1111:3511:5912:2312:4713:1113:35

0 of 48 minutes covered

Midday of Thursday 10 July

Taken. The only midday Saptamī reaches.

madhyāhna begins 11:59  12:47 madhyāhna ends
11:1111:3511:5912:2312:4713:1113:35

48 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 20:45 on Wed 9 Jul to 18:35 on Thu 10 Jul.

    1913-07-09T12:45:00Z → 1913-07-10T10:34:55Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:59–12:47 on the 9th, 11:59–12:47 on the 10th.

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

  3. 03

    Rule

    Saptamī must be present during madhyāhna. It covers 0 of 48 minutes on the 9th and 48 of 48 on the 10th.

    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 20874 s

  5. 05

    Ruling

    Vivasvat Saptamī, Baoding, 1913: Thursday 10 July.

    confidence: determinate

Say it like this

In Baoding, Vivasvat Saptamī 1913 falls on Thursday 10 July. Saptamī runs from 20:45 on Wed 9 Jul to 18:35 on Thu 10 Jul and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1913/vivasvat-saptami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 10 Jul
Ahargaṇa, classicalDisc centre, no refractionThu 10 Jul
compat-drikpanchangComparison profileThu 10 Jul
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 9thCoveredMadhyāhna 10thCoveredRuled
Los Angeles04:45 → 02:3511:3448 min11:340 min9 Jul
Chicago06:45 → 04:3511:3148 min11:320 min9 Jul
Jersey City07:45 → 05:3511:3748 min11:370 min9 Jul
Port of Spain08:45 → 06:3511:4748 min11:470 min9 Jul
London12:45 → 10:3511:410 min11:410 min10 Jul
Durban14:45 → 12:3511:370 min11:3748 min10 Jul
Dubai16:26 → 14:1611:410 min11:4148 min10 Jul
Delhi18:15 → 16:0512:020 min12:0248 min10 Jul
Kolkata18:15 → 16:0511:170 min11:1848 min10 Jul
Singapore19:45 → 17:3511:450 min11:4648 min10 Jul
Sydney22:45 → 20:3511:360 min11:3648 min10 Jul
Suva00:40 → 22:3011:420 min11:4248 min10 Jul
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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