Ruling · Vivasvat Saptamī · 2018

Thursday 19 July

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 198 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 18 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 Thursday 19 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 17:07 on Wed 18 Jul to 16:06 on Thu 19 Jul.

    2018-07-18T09:06:42Z → 2018-07-19T08:06:10Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:00–12:48 on the 18th, 12:00–12:48 on the 19th.

    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 18th and 48 of 48 on the 19th.

    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 11876 s

  5. 05

    Ruling

    Vivasvat Saptamī, Baoding, 2018: Thursday 19 July.

    confidence: determinate

Say it like this

In Baoding, Vivasvat Saptamī 2018 falls on Thursday 19 July. Saptamī runs from 17:07 on Wed 18 Jul to 16:06 on Thu 19 Jul and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2018/vivasvat-saptami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 19 Jul
Ahargaṇa, classicalDisc centre, no refractionThu 19 Jul
compat-drikpanchangComparison profileThu 19 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 18thCoveredMadhyāhna 19thCoveredRuled
Los Angeles02:07 → 01:0612:3548 min12:350 min18 Jul
Chicago04:07 → 03:0612:3348 min12:330 min18 Jul
Jersey City05:07 → 04:0612:3848 min12:380 min18 Jul
Port of Spain05:07 → 04:0611:4848 min11:480 min18 Jul
London10:07 → 09:0612:4248 min12:420 min18 Jul
Durban11:07 → 10:0611:3848 min11:380 min18 Jul
Dubai13:07 → 12:0612:010 min12:015 min19 Jul
Delhi14:37 → 13:3612:030 min12:0348 min19 Jul
Kolkata14:37 → 13:3611:190 min11:1948 min19 Jul
Singapore17:07 → 16:0612:470 min12:4748 min19 Jul
Sydney19:07 → 18:0611:380 min11:3848 min19 Jul
Suva21:07 → 20:0611:490 min11:4948 min19 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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