Ruling · Navarātrārambha (Navratri) · 2021

Thursday 7 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 227 minutes.

Decide it for

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 Wednesday 6 October

Pratipadā is absent from madhyāhna. Not taken.

madhyāhna begins 11:42  12:30 madhyāhna ends
10:5411:1811:4212:0612:3012:5413:18

0 of 48 minutes covered

Midday of Thursday 7 October

Taken. The only midday Pratipadā reaches.

madhyāhna begins 11:42  12:30 madhyāhna ends
10:5411:1811:4212:0612:3012:5413:18

48 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Pratipadā runs from 19:05 on Wed 6 Oct to 16:17 on Thu 7 Oct.

    2021-10-06T11:05:24Z → 2021-10-07T08:17:09Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:42–12:30 on the 6th, 11:42–12:30 on the 7th.

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

  3. 03

    Rule

    Pratipadā must be present during madhyāhna. It covers 0 of 48 minutes on the 6th and 48 of 48 on the 7th.

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

  4. 04

    Tie-break

    Only one midday qualifies. No tie-break is needed.

    priority: paraviddha → only-day · margin 13647 s

  5. 05

    Ruling

    Navarātrārambha, Baoding, 2021: Thursday 7 October.

    confidence: determinate

Say it like this

In Baoding, Navarātrārambha (Navratri) 2021 falls on Thursday 7 October. Pratipadā runs from 19:05 on Wed 6 Oct to 16:17 on Thu 7 Oct and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2021/navaratra-arambha · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 7 Oct
Ahargaṇa, classicalDisc centre, no refractionThu 7 Oct
compat-drikpanchangComparison profileThu 7 Oct
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/navaratra-arambha · ruleset 2026.3-draft

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

“S 1 Navaratrarambha (paraviddha).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlacePratipadāMadhyāhna 6thCoveredMadhyāhna 7thCoveredRuled
Los Angeles04:05 → 01:1712:1748 min12:160 min6 Oct
Chicago06:05 → 03:1712:1448 min12:140 min6 Oct
Jersey City07:05 → 04:1712:2048 min12:200 min6 Oct
Port of Spain07:05 → 04:1711:3048 min11:300 min6 Oct
London12:05 → 09:1712:2448 min12:240 min6 Oct
Durban13:05 → 10:1711:200 min11:200 min7 Oct
Dubai15:05 → 12:1711:430 min11:4235 min7 Oct
Delhi16:35 → 13:4711:450 min11:4548 min7 Oct
Kolkata16:35 → 13:4711:010 min11:0048 min7 Oct
Singapore19:05 → 16:1712:290 min12:2848 min7 Oct
Sydney22:05 → 19:1712:200 min12:1948 min7 Oct
Suva23:05 → 20:1711:310 min11:3048 min7 Oct
Profile · tradition
pac-rp@2026.1 · smarta
Rule
navaratra-arambha@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

About Ahargaṇa