Ruling · Guru Pūrṇimā · 2037

Monday 27 July

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 15 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 Sunday 26 July

Qualifies with 48 of 48 minutes. Not taken.

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

48 of 48 minutes covered

Midday of Monday 27 July

Taken. Both middays qualify; the rule takes the second.

madhyāhna begins 12:00  12:48 madhyāhna ends
Pūrṇimā ends 12:15:11
11:1211:3612:0012:2412:4813:1213:36

15 of 48 minutes covered, the first 15

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

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 11:04 on Sun 26 Jul to 12:15 on Mon 27 Jul.

    2037-07-26T03:03:58Z → 2037-07-27T04:15:12Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:00–12:48 on the 26th, 12:00–12:48 on the 27th.

    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 26th and 15 of 48 on the 27th.

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

  4. 04

    Tie-break

    Both middays qualify. Paraviddhā: the second is taken.

    priority: paraviddha → paraviddha · margin 884 s

  5. 05

    Ruling

    Guru Pūrṇimā, Baoding, 2037: Monday 27 July.

    confidence: determinate

Say it like this

In Baoding, Guru Pūrṇimā 2037 falls on Monday 27 July. Pūrṇimā runs from 11:04 on Sun 26 Jul to 12:15 on Mon 27 Jul and covers 15 of 48 minutes of madhyāhna that midday. It also reaches the previous midday for 48 minutes; by the rule the second midday is taken.

ahargana.org/baoding/festivals/2037/guru-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 27 Jul
Ahargaṇa, classicalDisc centre, no refractionMon 27 Jul
compat-drikpanchangComparison profileMon 27 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/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 26thCoveredMadhyāhna 27thCoveredRuled
Los Angeles20:04 → 21:1512:3548 min12:350 min26 Jul
Chicago22:04 → 23:1512:3348 min12:330 min26 Jul
Jersey City23:04 → 00:1512:3948 min12:390 min26 Jul
Port of Spain23:04 → 00:1511:4948 min11:490 min26 Jul
London04:04 → 05:1512:4348 min12:430 min26 Jul
Durban05:04 → 06:1511:3948 min11:390 min26 Jul
Dubai07:04 → 08:1512:0148 min12:010 min26 Jul
Delhi08:34 → 09:4512:0448 min12:030 min26 Jul
Kolkata08:34 → 09:4511:1948 min11:190 min26 Jul
Singapore11:04 → 12:1512:4748 min12:470 min26 Jul
Sydney13:04 → 14:1511:380 min11:3848 min27 Jul
Suva15:04 → 16:1511:490 min11:4948 min27 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