Ruling · Guru Pūrṇimā · 1981

Thursday 16 July

Determinatein Bucharest, under the Rashtriya Panchang method. Clear of every threshold by 319 minutes.

Decide it for

BucharestDelhiKolkataSingaporeSydneyJersey City

44°26′ N 26°06′ E · Europe/Bucharest · GeoNames 683506

The two middays

One ghaṭī is 24 minutes. Madhyāhna is 1 ghaṭikā either side of midday.

Midday of Thursday 16 July

Taken. The only midday Pūrṇimā reaches.

madhyāhna begins 12:57  13:45 madhyāhna ends
12:0912:3312:5713:2113:4514:0914:33

48 of 48 minutes covered

Midday of Friday 17 July

Pūrṇimā is absent from madhyāhna. Not taken.

madhyāhna begins 12:57  13:45 madhyāhna ends
12:0912:3312:5713:2113:4514:0914:33

0 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 06:46 on Thu 16 Jul to 07:39 on Fri 17 Jul.

    1981-07-16T03:45:33Z → 1981-07-17T04:38:49Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:57–13:45 on the 16th, 12:57–13:45 on the 17th.

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

  3. 03

    Rule

    Pūrṇimā must be present during madhyāhna. It covers 48 of 48 minutes on the 16th and 0 of 48 on the 17th.

    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: paraviddha → only-day · margin 19112 s

  5. 05

    Ruling

    Guru Pūrṇimā, Bucharest, 1981: Thursday 16 July.

    confidence: determinate

Say it like this

In Bucharest, Guru Pūrṇimā 1981 falls on Thursday 16 July. Pūrṇimā runs from 06:46 on Thu 16 Jul to 07:39 on Fri 17 Jul and covers all of madhyāhna that midday.

ahargana.org/bucharest/festivals/1981/guru-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 16 Jul
Ahargaṇa, classicalDisc centre, no refractionThu 16 Jul
compat-drikpanchangComparison profileThu 16 Jul
No institution has a recorded ruling for Bucharest.

Institutional rulings are recorded with a source address, and are never edited to agree.

The rule, as data

/rules/guru-purnima · ruleset 2026.3-draft

Month
Āṣāḍha, amānta
Pakṣa · aṅga
Śukla · Pūrṇimā
Kāla
Madhyāhna
Priority
Paraviddhā
Tie-break
Second day
Reference
CRC 1955, p. 102

“S 15 Guru purnima (paraviddha), Vyasa puja (paraviddha, 3 muhurtas after sunrise), Kokila vrata (sayahna vyapini). Siva sayanotsava (pradosavyapini).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlacePūrṇimāMadhyāhna 16thCoveredMadhyāhna 17thCoveredRuled
Los Angeles20:46 → 21:3912:3548 min12:350 min16 Jul
Chicago22:46 → 23:3912:3248 min12:320 min16 Jul
Jersey City23:46 → 00:3912:3848 min12:380 min16 Jul
Port of Spain23:46 → 00:3911:4848 min11:480 min16 Jul
London04:46 → 05:3912:4248 min12:420 min16 Jul
Durban05:46 → 06:3911:3848 min11:380 min16 Jul
Dubai07:46 → 08:3912:0148 min12:010 min16 Jul
Delhi09:16 → 10:0912:0348 min12:030 min16 Jul
Kolkata09:16 → 10:0911:1848 min11:180 min16 Jul
Singapore11:16 → 12:0912:1748 min12:170 min16 Jul
Sydney13:46 → 14:3911:370 min11:3748 min17 Jul
Suva15:46 → 16:3911:480 min11:4848 min17 Jul
Profile · tradition
pac-rp@2026.1 · smarta
Rule
guru-purnima@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

About Ahargaṇa