Ruling · Vivasvat Saptamī · 1918

Monday 15 July

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 605 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 14 July

Saptamī is absent from madhyāhna. Not taken.

madhyāhna begins 12:00  12:48 madhyāhna ends
11:1211:3612:0012:2412:4813:1213:36

0 of 48 minutes covered

Midday of Monday 15 July

Taken. The only midday Saptamī reaches.

madhyāhna begins 12:00  12:48 madhyāhna ends
11:1211:3612:0012:2412:4813:1213:36

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 22:52 on Sun 14 Jul to 01:14 on Tue 16 Jul.

    1918-07-14T14:52:06Z → 1918-07-15T17:13:56Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:00–12:48 on the 14th, 12:00–12:48 on the 15th.

    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 14th and 48 of 48 on the 15th.

    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 36275 s

  5. 05

    Ruling

    Vivasvat Saptamī, Baoding, 1918: Monday 15 July.

    confidence: determinate

Say it like this

In Baoding, Vivasvat Saptamī 1918 falls on Monday 15 July. Saptamī runs from 22:52 on Sun 14 Jul to 01:14 on Tue 16 Jul and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1918/vivasvat-saptami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 15 Jul
Ahargaṇa, classicalDisc centre, no refractionMon 15 Jul
compat-drikpanchangComparison profileMon 15 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 14thCoveredMadhyāhna 15thCoveredRuled
Los Angeles07:52 → 10:1412:3448 min12:350 min14 Jul
Chicago09:52 → 12:1412:3248 min12:320 min14 Jul
Jersey City10:52 → 13:1412:3848 min12:3836 min14 Jul
Port of Spain10:52 → 13:1411:4848 min11:4848 min14 Jul
London15:52 → 18:1412:420 min12:4248 min15 Jul
Durban16:52 → 19:1411:380 min11:3848 min15 Jul
Dubai18:33 → 20:5511:410 min11:4148 min15 Jul
Delhi20:22 → 22:4412:030 min12:0348 min15 Jul
Kolkata20:22 → 22:4411:180 min11:1848 min15 Jul
Singapore21:52 → 00:1411:460 min11:4648 min15 Jul
Sydney00:52 → 03:1411:370 min11:3748 min15 Jul
Suva02:52 → 05:1411:480 min11:4848 min15 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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