Ruling · Yama Dvitīyā (Bhai Dooj) · 1908

Tuesday 27 October

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 214 minutes.

Decide it for

DaqingDelhiKolkataSingaporeSydneyJersey City

46°35′ N 125°00′ E · Asia/Shanghai · GeoNames 2037860

The two middays

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

Midday of Monday 26 October

Dvitīyā is absent from madhyāhna. Not taken.

madhyāhna begins 11:00  11:48 madhyāhna ends
10:1210:3611:0011:2411:4812:1212:36

0 of 48 minutes covered

Midday of Tuesday 27 October

Taken. The only midday Dvitīyā reaches.

madhyāhna begins 11:00  11:48 madhyāhna ends
10:1210:3611:0011:2411:4812:1212:36

48 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Dvitīyā runs from 15:22 on Mon 26 Oct to 15:34 on Tue 27 Oct.

    1908-10-26T07:22:10Z → 1908-10-27T07:34:06Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:00–11:48 on the 26th, 11:00–11:48 on the 27th.

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

  3. 03

    Rule

    Dvitīyā must be present during madhyāhna. It covers 0 of 48 minutes on the 26th and 48 of 48 on the 27th.

    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: purvaviddha → only-day · margin 12864 s

  5. 05

    Ruling

    Yama Dvitīyā, Daqing, 1908: Tuesday 27 October.

    confidence: determinate

Say it like this

In Daqing, Yama Dvitīyā (Bhai Dooj) 1908 falls on Tuesday 27 October. Dvitīyā runs from 15:22 on Mon 26 Oct to 15:34 on Tue 27 Oct and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/1908/yama-dvitiya · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 27 Oct
Ahargaṇa, classicalDisc centre, no refractionTue 27 Oct
compat-drikpanchangComparison profileTue 27 Oct
No institution has a recorded ruling for Daqing.

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

The rule, as data

/rules/yama-dvitiya · ruleset 2026.3-draft

Month
Kārtika, amānta
Pakṣa · aṅga
Śukla · Dvitīyā
Kāla
Madhyāhna
Priority
Pūrvaviddhā
Tie-break
First day
Reference
CRC 1955, p. 104

“S 2 Bhratrdvitiya, Yamadvitiya (madhyahna, purvaviddha), Masyadhara (Dwat) puja (Bihar).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceDvitīyāMadhyāhna 26thCoveredMadhyāhna 27thCoveredRuled
Los Angeles23:22 → 23:3411:1348 min11:130 min26 Oct
Chicago01:22 → 01:3411:1048 min11:100 min26 Oct
Jersey City02:22 → 02:3411:1648 min11:160 min26 Oct
Port of Spain03:22 → 03:3411:2648 min11:260 min26 Oct
London07:22 → 07:3411:2048 min11:200 min26 Oct
Durban09:22 → 09:3411:1648 min11:160 min26 Oct
Dubai11:03 → 11:1511:2048 min11:200 min26 Oct
Delhi12:52 → 13:0411:410 min11:4148 min27 Oct
Kolkata12:52 → 13:0410:570 min10:5648 min27 Oct
Singapore14:22 → 14:3411:250 min11:2548 min27 Oct
Sydney17:22 → 17:3411:160 min11:1548 min27 Oct
Suva19:17 → 19:2911:220 min11:2148 min27 Oct
Profile · tradition
pac-rp@2026.1 · smarta
Rule
yama-dvitiya@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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