Ruling · Mahāśivarātri · 2046

Monday 5 March

Boundaryin Daqing, under the Rashtriya Panchang method. Both nights qualify and the authorities the rule cites disagree. Say “contested”.

Decide it for

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

The two nights

One ghaṭī is 24 minutes. Niśītha is 1 ghaṭikā either side of midnight.

Night of Monday 5 March

Taken. Both nights qualify; the rule is silent, and this one is covered longer.

niśītha begins 23:27  00:15 niśītha ends
22:3923:0323:2723:5100:1500:3901:03

48 of 48 minutes covered

Night of Tuesday 6 March

Qualifies with 9 of 48 minutes. Not taken.

niśītha begins 23:27  00:15 niśītha ends
Caturdaśī ends 23:35:27
22:3923:0323:2723:5100:1500:3901:03

9 of 48 minutes covered, the first 9

Caturdaśī presentNiśītha, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Caturdaśī runs from 20:56 on Mon 5 Mar to 23:35 on Tue 6 Mar.

    2046-03-05T12:55:33Z → 2046-03-06T15:35:27Z

  2. 02

    Kāla

    Niśītha is 1 ghaṭikā either side of midnight: 23:27–00:15 on the 5th, 23:27–00:15 on the 6th.

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

  3. 03

    Rule

    Caturdaśī must be present during niśītha. It covers 48 of 48 minutes on the 5th and 9 of 48 on the 6th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105

  4. 04

    Tie-break

    Both nights qualify and the cited authorities disagree. The one covered longer is ruled, as a boundary.

    priority: disputed → greater-coverage · margin 524 s

  5. 05

    Ruling

    Mahāśivarātri, Daqing, 2046: Monday 5 March.

    confidence: boundary (tie-break-disputed)

Say it like this

In Daqing, Mahāśivarātri 2046 falls on Monday 5 March. Caturdaśī runs from 20:56 on Mon 5 Mar to 23:35 on Tue 6 Mar and covers all of niśītha that night. It also reaches the next night for 9 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested.

ahargana.org/daqing/festivals/2046/maha-shivaratri · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 5 Mar
Ahargaṇa, classicalDisc centre, no refractionMon 5 Mar
compat-drikpanchangComparison profileMon 5 Mar
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/maha-shivaratri · ruleset 2026.3-draft

Month
Māgha, amānta
Pakṣa · aṅga
Kṛṣṇa · Caturdaśī
Kāla
Niśītha
Priority
Disputed
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 105

“K 14 Mahasivaratri (nisithavyapini) — In some opinion it is to be observed on nisitha and in some opinion on pradosa. If occurs on two successive nisithas then according to Hemadri it is to be observed on the first day and according to Madhava, to be observed on the second day” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105. The alternative opinion that reads pradoṣa instead of niśītha is not evaluated.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceCaturdaśīNiśītha 5thCoveredNiśītha 6thCoveredRuled
Los Angeles04:56 → 07:3523:4048 min23:400 min5 Mar
Chicago06:56 → 09:3523:3748 min23:370 min5 Mar
Jersey City07:56 → 10:3523:4348 min23:430 min5 Mar
Port of Spain08:56 → 11:3523:5348 min23:530 min5 Mar
London12:56 → 15:3523:4748 min23:470 min5 Mar
Durban14:56 → 17:3523:4348 min23:430 min5 Mar
Dubai16:56 → 19:3500:0648 min00:060 min5 Mar
Delhi18:26 → 21:0500:0848 min00:080 min5 Mar
Kolkata18:26 → 21:0523:2448 min23:240 min5 Mar
Singapore20:56 → 23:3500:5248 min00:520 min5 Mar
Sydney23:56 → 02:3500:4348 min00:4348 min5 Mar
Suva00:56 → 03:3523:540 min23:5448 min6 Mar
Profile · tradition
pac-rp@2026.1 · smarta
Rule
maha-shivaratri@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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