Ruling · Hala Ṣaṣṭhī · 1920

Saturday 4 September

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 342 minutes.

Decide it for

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 Friday 3 September

Ṣaṣṭhī is absent from madhyāhna. Not taken.

madhyāhna begins 11:15  12:03 madhyāhna ends
10:2710:5111:1511:3912:0312:2712:51

0 of 48 minutes covered

Midday of Saturday 4 September

Taken. The only midday Ṣaṣṭhī reaches.

madhyāhna begins 11:15  12:03 madhyāhna ends
10:2710:5111:1511:3912:0312:2712:51

48 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Ṣaṣṭhī runs from 19:09 on Fri 3 Sep to 17:45 on Sat 4 Sep.

    1920-09-03T11:08:32Z → 1920-09-04T09:45:00Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:15–12:03 on the 3rd, 11:15–12:03 on the 4th.

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

  3. 03

    Rule

    Ṣaṣṭhī must be present during madhyāhna. It covers 0 of 48 minutes on the 3rd and 48 of 48 on the 4th.

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

  4. 04

    Tie-break

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

    priority: paraviddha → only-day · margin 20540 s

  5. 05

    Ruling

    Hala Ṣaṣṭhī, Daqing, 1920: Saturday 4 September.

    confidence: determinate

Say it like this

In Daqing, Hala Ṣaṣṭhī 1920 falls on Saturday 4 September. Ṣaṣṭhī runs from 19:09 on Fri 3 Sep to 17:45 on Sat 4 Sep and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/1920/hala-shashthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 4 Sep
Ahargaṇa, classicalDisc centre, no refractionSat 4 Sep
compat-drikpanchangComparison profileSat 4 Sep
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/hala-shashthi · ruleset 2026.3-draft

Month
Śrāvaṇa, amānta
Pakṣa · aṅga
Kṛṣṇa · Ṣaṣṭhī
Kāla
Madhyāhna
Priority
Paraviddhā
Tie-break
Second day
Reference
CRC 1955, p. 103

“K 6 Hala sasthi (paraviddha).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceṢaṣṭhīMadhyāhna 3rdCoveredMadhyāhna 4thCoveredRuled
Los Angeles03:09 → 01:4511:2848 min11:280 min3 Sep
Chicago06:09 → 04:4512:2548 min12:250 min3 Sep
Jersey City07:09 → 05:4512:3148 min12:310 min3 Sep
Port of Spain07:09 → 05:4511:4148 min11:410 min3 Sep
London12:09 → 10:4512:3548 min12:350 min3 Sep
Durban13:09 → 11:4511:310 min11:3114 min4 Sep
Dubai15:09 → 13:4511:540 min11:5448 min4 Sep
Delhi16:39 → 15:1511:560 min11:5648 min4 Sep
Kolkata16:39 → 15:1511:120 min11:1148 min4 Sep
Singapore18:09 → 16:4511:400 min11:4048 min4 Sep
Sydney21:09 → 19:4511:310 min11:3148 min4 Sep
Suva23:09 → 21:4511:420 min11:4248 min4 Sep
Profile · tradition
pac-rp@2026.1 · smarta
Rule
hala-shashthi@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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