Ruling · Guru Pūrṇimā · 1970

Saturday 18 July

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 276 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 Saturday 18 July

Taken. The only midday Pūrṇimā reaches.

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

48 of 48 minutes covered

Midday of Sunday 19 July

Pūrṇimā 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

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

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 07:24 on Sat 18 Jul to 03:58 on Sun 19 Jul.

    1970-07-17T23:24:05Z → 1970-07-18T19:58:28Z

  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

    Pūrṇimā must be present during madhyāhna. It covers 48 of 48 minutes on the 18th and 0 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: paraviddha → only-day · margin 16557 s

  5. 05

    Ruling

    Guru Pūrṇimā, Baoding, 1970: Saturday 18 July.

    confidence: determinate

Say it like this

In Baoding, Guru Pūrṇimā 1970 falls on Saturday 18 July. Pūrṇimā runs from 07:24 on Sat 18 Jul to 03:58 on Sun 19 Jul and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1970/guru-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 18 Jul
Ahargaṇa, classicalDisc centre, no refractionSat 18 Jul
compat-drikpanchangComparison profileSat 18 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 17thCoveredMadhyāhna 18thCoveredRuled
Los Angeles16:24 → 12:5812:350 min12:3524 min18 Jul
Chicago18:24 → 14:5812:320 min12:3248 min18 Jul
Jersey City19:24 → 15:5812:380 min12:3848 min18 Jul
Port of Spain19:24 → 15:5811:480 min11:4848 min18 Jul
London00:24 → 20:5812:420 min12:4248 min18 Jul
Durban01:24 → 21:5811:380 min11:3848 min18 Jul
Dubai03:24 → 23:5812:010 min12:0148 min18 Jul
Delhi04:54 → 01:2812:030 min12:0348 min18 Jul
Kolkata04:54 → 01:2811:180 min11:1948 min18 Jul
Singapore06:54 → 03:2812:170 min12:1748 min18 Jul
Sydney09:24 → 05:5811:370 min11:3748 min18 Jul
Suva11:24 → 07:5811:480 min11:4848 min18 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

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