Ruling · Caitrī Pūrṇimā · 1977

Monday 4 April

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 11 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 3 April

Pūrṇimā is absent from madhyāhna. Not taken.

madhyāhna begins 11:58  12:46 madhyāhna ends
11:1011:3411:5812:2212:4613:1013:34

0 of 48 minutes covered

Midday of Monday 4 April

Taken. The only midday Pūrṇimā reaches.

madhyāhna begins 11:58  12:46 madhyāhna ends
Pūrṇimā ends 12:08:52
11:1011:3411:5812:2212:4613:1013:34

11 of 48 minutes covered, the first 11

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

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 14:59 on Sun 3 Apr to 12:09 on Mon 4 Apr.

    1977-04-03T06:59:06Z → 1977-04-04T04:08:52Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:58–12:46 on the 3rd, 11:58–12:46 on the 4th.

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

  3. 03

    Rule

    Pūrṇimā must be present during madhyāhna. It covers 0 of 48 minutes on the 3rd and 11 of 48 on the 4th.

    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 678 s

  5. 05

    Ruling

    Caitrī Pūrṇimā, Baoding, 1977: Monday 4 April.

    confidence: determinate

Say it like this

In Baoding, Caitrī Pūrṇimā 1977 falls on Monday 4 April. Pūrṇimā runs from 14:59 on Sun 3 Apr to 12:09 on Mon 4 Apr and covers 11 of 48 minutes of madhyāhna that midday.

ahargana.org/baoding/festivals/1977/chaitri-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 4 Apr
Ahargaṇa, classicalDisc centre, no refractionMon 4 Apr
compat-drikpanchangComparison profileMon 4 Apr
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/chaitri-purnima · ruleset 2026.3-draft

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

“S 15 Caitri purnima (paraviddha), Hanumat jayanti, Oli ending (Jain).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlacePūrṇimāMadhyāhna 3rdCoveredMadhyāhna 4thCoveredRuled
Los Angeles22:59 → 20:0911:3248 min11:320 min3 Apr
Chicago00:59 → 22:0911:3048 min11:300 min3 Apr
Jersey City01:59 → 23:0911:3648 min11:360 min3 Apr
Port of Spain02:59 → 00:0911:4548 min11:450 min3 Apr
London07:59 → 05:0912:4048 min12:400 min3 Apr
Durban08:59 → 06:0911:3548 min11:350 min3 Apr
Dubai10:59 → 08:0911:5848 min11:580 min3 Apr
Delhi12:29 → 09:3912:0120 min12:000 min3 Apr
Kolkata12:29 → 09:3911:160 min11:160 min4 Apr
Singapore14:29 → 11:3912:140 min12:140 min4 Apr
Sydney16:59 → 14:0911:340 min11:3448 min4 Apr
Suva18:59 → 16:0911:460 min11:4548 min4 Apr
Profile · tradition
pac-rp@2026.1 · smarta
Rule
chaitri-purnima@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

About Ahargaṇa