Ruling · Caitrī Pūrṇimā · 2027

Tuesday 20 April

Determinatein Ujjain, under the Rashtriya Panchang method. Clear of every threshold by 430 minutes.

Decide it for

UjjainDelhiKolkataSingaporeSydneyJersey City

23°11′ N 75°47′ E · Asia/Kolkata · GeoNames 1253914

The two middays

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

Midday of Tuesday 20 April

Taken. The only midday Pūrṇimā reaches.

madhyāhna begins 12:02  12:50 madhyāhna ends
11:1411:3812:0212:2612:5013:1413:38

48 of 48 minutes covered

Midday of Wednesday 21 April

Pūrṇimā is absent from madhyāhna. Not taken.

madhyāhna begins 12:02  12:50 madhyāhna ends
11:1411:3812:0212:2612:5013:1413:38

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 04:52 on Tue 20 Apr to 03:57 on Wed 21 Apr.

    2027-04-19T23:21:51Z → 2027-04-20T22:27:10Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:02–12:50 on the 20th, 12:02–12:50 on the 21st.

    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 20th and 0 of 48 on the 21st.

    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 25813 s

  5. 05

    Ruling

    Caitrī Pūrṇimā, Ujjain, 2027: Tuesday 20 April.

    confidence: determinate

Say it like this

In Ujjain, Caitrī Pūrṇimā 2027 falls on Tuesday 20 April. Pūrṇimā runs from 04:52 on Tue 20 Apr to 03:57 on Wed 21 Apr and covers all of madhyāhna that midday.

ahargana.org/ujjain/festivals/2027/chaitri-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 20 Apr
Ahargaṇa, classicalDisc centre, no refractionTue 20 Apr
compat-drikpanchangComparison profileTue 20 Apr
No institution has a recorded ruling for Ujjain.

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 19thCoveredMadhyāhna 20thCoveredRuled
Los Angeles16:22 → 15:2712:280 min12:2848 min20 Apr
Chicago18:22 → 17:2712:260 min12:2648 min20 Apr
Jersey City19:22 → 18:2712:320 min12:3248 min20 Apr
Port of Spain19:22 → 18:2711:410 min11:4148 min20 Apr
London00:22 → 23:2712:360 min12:3648 min20 Apr
Durban01:22 → 00:2711:310 min11:3148 min20 Apr
Dubai03:22 → 02:2711:540 min11:5448 min20 Apr
Delhi04:52 → 03:5711:570 min11:5648 min20 Apr
Kolkata04:52 → 03:5711:120 min11:1248 min20 Apr
Singapore07:22 → 06:2712:400 min12:4048 min20 Apr
Sydney09:22 → 08:2711:300 min11:3048 min20 Apr
Suva11:22 → 10:2711:410 min11:4148 min20 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