Ruling · Mahāṣṭamī (Durga Ashtami) · 2021

Wednesday 13 October

Determinatein Manaus, under the Rashtriya Panchang method. Clear of every threshold by 7 min 33 s.

Decide it for

ManausDelhiKolkataSingaporeSydneyJersey City

3°06′ S 60°02′ W · America/Manaus · GeoNames 3663517

The two middays

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

Midday of Tuesday 12 October

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:23  12:11 madhyāhna ends
Aṣṭamī begins 12:18:03
10:3510:5911:2311:4712:1112:3512:59

0 of 48 minutes covered

Midday of Wednesday 13 October

Taken. Aṣṭamī reaches neither midday; the rule takes the second day.

madhyāhna begins 11:22  12:10 madhyāhna ends
Aṣṭamī ends 10:38:13
10:3410:5811:2211:4612:1012:3412:58

0 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Aṣṭamī runs from 12:18 on Tue 12 Oct to 10:38 on Wed 13 Oct.

    2021-10-12T16:18:03Z → 2021-10-13T14:38:14Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:23–12:11 on the 12th, 11:22–12:10 on the 13th.

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

  3. 03

    Rule

    Aṣṭamī must be present during madhyāhna. It covers 0 of 48 minutes on the 12th and 0 of 48 on the 13th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104

  4. 04

    Tie-break

    Neither midday qualifies. The rule takes the second day.

    priority: paraviddha → second-day · margin 453 s

  5. 05

    Ruling

    Mahāṣṭamī, Manaus, 2021: Wednesday 13 October.

    confidence: determinate

Say it like this

In Manaus, Mahāṣṭamī (Durga Ashtami) 2021 falls on Wednesday 13 October. Aṣṭamī runs from 12:18 on Tue 12 Oct to 10:38 on Wed 13 Oct, and reaches madhyāhna on neither day.

ahargana.org/manaus/festivals/2021/mahashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 13 Oct
Ahargaṇa, classicalDisc centre, no refractionWed 13 Oct
compat-drikpanchangComparison profileWed 13 Oct
No institution has a recorded ruling for Manaus.

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

The rule, as data

/rules/mahashtami · ruleset 2026.3-draft

Month
Āśvina, amānta
Pakṣa · aṅga
Śukla · Aṣṭamī
Kāla
Madhyāhna
Priority
Paraviddhā
Tie-break
Second day
Reference
CRC 1955, p. 104

“S 8 Mahastami (paraviddha)” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceAṣṭamīMadhyāhna 12thCoveredMadhyāhna 13thCoveredRuled
Los Angeles09:18 → 07:3812:1548 min12:150 min12 Oct
Chicago11:18 → 09:3812:1348 min12:120 min12 Oct
Jersey City12:18 → 10:3812:1848 min12:180 min12 Oct
Port of Spain12:18 → 10:3811:280 min11:280 min13 Oct
London17:18 → 15:3812:220 min12:2248 min13 Oct
Durban18:18 → 16:3811:190 min11:1848 min13 Oct
Dubai20:18 → 18:3811:410 min11:4148 min13 Oct
Delhi21:48 → 20:0811:430 min11:4348 min13 Oct
Kolkata21:48 → 20:0810:590 min10:5948 min13 Oct
Singapore00:18 → 22:3812:270 min12:2748 min13 Oct
Sydney03:18 → 01:3812:180 min12:1848 min13 Oct
Suva04:18 → 02:3811:290 min11:2948 min13 Oct
Profile · tradition
pac-rp@2026.1 · smarta
Rule
mahashtami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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