Ruling · Holī · 1937

Friday 26 March

Boundaryin Chicago, under the Rashtriya Panchang method. Kept the day after Holikā Dahana, Thu 25 Mar. Both late afternoons qualify and the rule does not say which to take. Say “contested”.

Decide it for

41°51′ N 87°39′ W · America/Chicago · GeoNames 4887398

The two late afternoons

One ghaṭī is 24 minutes. Sāyāhna is last 3 of 15 day muhūrtas.

Late afternoon of Thursday 25 March

Taken for Holikā Dahana. Both late afternoons qualify; the rule is silent, and this one is covered longer. Holī is the day after.

15:40 sāyāhna beginssunset 18:08
Pūrṇimā begins 15:59:18
15:1615:4016:0416:2816:5217:1617:4018:0418:28

129 of 148 minutes covered, the last 129

Late afternoon of Friday 26 March

Qualifies with 92 of 149 minutes. Not taken.

15:40 sāyāhna beginssunset 18:09
Pūrṇimā ends 17:12:11
15:1615:4016:0416:2816:5217:1617:4018:0418:28

92 of 149 minutes covered, the first 92

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

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 15:59 on Thu 25 Mar to 17:12 on Fri 26 Mar.

    1937-03-25T21:59:18Z → 1937-03-26T23:12:11Z

  2. 02

    Kāla

    Sāyāhna is last 3 of 15 day muhūrtas: 15:40–18:08 on the 25th, 15:40–18:09 on the 26th.

    sayahna: day-muhurta-13-15 · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Pūrṇimā must be present during sāyāhna. It covers 129 of 148 minutes on the 25th and 92 of 149 on the 26th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105

  4. 04

    Tie-break

    Both late afternoons qualify and the rule marks neither. The one covered longer is ruled, as a boundary.

    priority: unstated → greater-coverage · margin 1188 s

  5. 05

    Counted

    Holī is kept the day after Holikā Dahana: Thursday 25 March is the day taken above.

    follows: holika-dahana + 1 d

  6. 06

    Ruling

    Holī, Chicago, 1937: Friday 26 March.

    confidence: boundary (tie-break-unstated)

Say it like this

In Chicago, Holī 1937 falls on Friday 26 March. It is kept the day after Holikā Dahana, which falls on Thursday 25 March. Pūrṇimā runs from 15:59 on Thu 25 Mar to 17:12 on Fri 26 Mar and covers 129 of 148 minutes of sāyāhna on the 25th. It also reaches the next late afternoon for 92 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested.

ahargana.org/chicago/festivals/1937/holi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 26 Mar
Ahargaṇa, classicalDisc centre, no refractionFri 26 Mar
compat-drikpanchangComparison profileFri 26 Mar
No institution has a recorded ruling for Chicago.

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

The rule, as data

/rules/holi · ruleset 2026.3-draft

Month
Phālguna, amānta
Pakṣa · aṅga
Śukla · Pūrṇimā
Kāla
Sāyāhna
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Kept
The day after Holikā Dahana

“S 15 Holika-dahana (Sayahnavyapini — it should be observed on second half of purnima at night), Dolayatra (Bengal & Orissa) (covering 4 ghatikas before sunrise of the day of festival), Holi — on the day after Holikadahana.” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlacePūrṇimāSāyāhna 25thCoveredSāyāhna 26thCoveredRuled
Los Angeles13:59 → 15:1215:41148 min15:410 min26 Mar
Chicago15:59 → 17:1215:40129 min15:4092 min26 Mar
Jersey City16:59 → 18:1215:4574 min15:45147 min27 Mar
Port of Spain17:59 → 19:1215:5117 min15:51146 min27 Mar
London21:59 → 23:1215:510 min15:52150 min27 Mar
Durban23:59 → 01:1215:380 min15:37143 min27 Mar
Dubai01:59 → 03:1216:050 min16:05147 min27 Mar
Delhi03:29 → 04:4216:080 min16:08147 min27 Mar
Kolkata03:29 → 04:4215:230 min15:23147 min27 Mar
Singapore05:19 → 06:3216:090 min16:08145 min27 Mar
Sydney07:59 → 09:1215:370 min15:36143 min27 Mar
Suva09:59 → 11:1215:490 min15:49144 min27 Mar
Profile · tradition
pac-rp@2026.1 · smarta
Rule
holi@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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