Ruling · Bahulā Caturthī · 2021

Wednesday 25 August

Determinatein Chattogram, under the Rashtriya Panchang method. Clear of every threshold by 30 minutes.

Decide it for

ChattogramDelhiKolkataSingaporeSydneyJersey City

22°20′ N 91°50′ E · Asia/Dhaka · GeoNames 1205733

The two late afternoons

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

Late afternoon of Wednesday 25 August

Taken. Both late afternoons qualify; the rule takes the first.

15:43 sāyāhna beginssunset 18:16
Caturthī begins 16:49:01
15:1915:4316:0716:3116:5517:1917:4318:0718:31

87 of 152 minutes covered, the last 87

Late afternoon of Thursday 26 August

Qualifies with 122 of 152 minutes. Not taken.

15:43 sāyāhna beginssunset 18:15
Caturthī ends 17:44:23
15:1915:4316:0716:3116:5517:1917:4318:0718:31

122 of 152 minutes covered, the first 122

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

How it was decided

  1. 01

    Aṅga

    Caturthī runs from 16:49 on Wed 25 Aug to 17:44 on Thu 26 Aug.

    2021-08-25T10:49:01Z → 2021-08-26T11:44:23Z

  2. 02

    Kāla

    Sāyāhna is last 3 of 15 day muhūrtas: 15:43–18:16 on the 25th, 15:43–18:15 on the 26th.

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

  3. 03

    Rule

    Caturthī must be present during sāyāhna. It covers 87 of 152 minutes on the 25th and 122 of 152 on the 26th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103

  4. 04

    Tie-break

    Both late afternoons qualify. Pūrvaviddhā: the first is taken.

    priority: purvaviddha → purvaviddha · margin 1829 s

  5. 05

    Ruling

    Bahulā Caturthī, Chattogram, 2021: Wednesday 25 August.

    confidence: determinate

Say it like this

In Chattogram, Bahulā Caturthī 2021 falls on Wednesday 25 August. Caturthī runs from 16:49 on Wed 25 Aug to 17:44 on Thu 26 Aug and covers 87 of 152 minutes of sāyāhna that late afternoon. It also reaches the next late afternoon for 122 minutes; by the rule the first late afternoon is taken.

ahargana.org/chattogram/festivals/2021/bahula-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 25 Aug
Ahargaṇa, classicalDisc centre, no refractionWed 25 Aug
compat-drikpanchangComparison profileWed 25 Aug
No institution has a recorded ruling for Chattogram.

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

The rule, as data

/rules/bahula-chaturthi · ruleset 2026.3-draft

Month
Śrāvaṇa, amānta
Pakṣa · aṅga
Kṛṣṇa · Caturthī
Kāla
Sāyāhna
Priority
Pūrvaviddhā
Tie-break
First day
Reference
CRC 1955, p. 103

“K 4 Bahula caturthi (Madhyadesa) (Sayahnavyapini: if occurs on two successive days, it is to be observed on the 1st day).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceCaturthīSāyāhna 25thCoveredSāyāhna 26thCoveredRuled
Los Angeles03:49 → 04:4416:50157 min16:490 min25 Aug
Chicago05:49 → 06:4416:54161 min16:530 min25 Aug
Jersey City06:49 → 07:4416:58160 min16:570 min25 Aug
Port of Spain06:49 → 07:4415:51148 min15:500 min25 Aug
London11:49 → 12:4417:14168 min17:120 min25 Aug
Durban12:49 → 13:4415:21136 min15:220 min25 Aug
Dubai14:49 → 15:4416:11153 min16:100 min25 Aug
Delhi16:19 → 17:1416:15151 min16:1460 min25 Aug
Kolkata16:19 → 17:1415:27101 min15:27108 min25 Aug
Singapore18:49 → 19:4416:4522 min16:45146 min25 Aug
Sydney20:49 → 21:4415:180 min15:19134 min26 Aug
Suva22:49 → 23:4415:380 min15:38140 min26 Aug
Profile · tradition
pac-rp@2026.1 · smarta
Rule
bahula-chaturthi@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

About Ahargaṇa