Ruling · Mahāśivarātri (Shivratri) · 2037

Friday 13 February

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 410 minutes.

Decide it for

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two nights

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

Night of Thursday 12 February

Caturdaśī is absent from niśītha. Not taken.

niśītha begins 00:08  00:56 niśītha ends
23:2023:4400:0800:3200:5601:2001:44

0 of 48 minutes covered

Night of Friday 13 February

Taken. The only night Caturdaśī reaches.

niśītha begins 00:08  00:56 niśītha ends
23:2023:4400:0800:3200:5601:2001:44

48 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Caturdaśī runs from 07:46 on Fri 13 Feb to 10:16 on Sat 14 Feb.

    2037-02-12T23:46:03Z → 2037-02-14T02:15:37Z

  2. 02

    Kāla

    Niśītha is 1 ghaṭikā either side of midnight: 00:08–00:56 on the 12th, 00:08–00:56 on the 13th.

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

  3. 03

    Rule

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

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

  4. 04

    Tie-break

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

    priority: disputed → only-day · margin 24603 s

  5. 05

    Ruling

    Mahāśivarātri, Baoding, 2037: Friday 13 February.

    confidence: determinate

Say it like this

In Baoding, Mahāśivarātri (Shivratri) 2037 falls on Friday 13 February. Caturdaśī runs from 07:46 on Fri 13 Feb to 10:16 on Sat 14 Feb and covers all of niśītha that night.

ahargana.org/baoding/festivals/2037/maha-shivaratri · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 13 Feb
Ahargaṇa, classicalDisc centre, no refractionFri 13 Feb
compat-drikpanchangComparison profileFri 13 Feb
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/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 12thCoveredNiśītha 14thCoveredRuled
Los Angeles15:46 → 18:1623:4348 min23:430 min12 Feb
Chicago17:46 → 20:1623:4048 min23:400 min12 Feb
Jersey City18:46 → 21:1623:4648 min23:460 min12 Feb
Port of Spain19:46 → 22:1623:5648 min23:560 min12 Feb
London23:46 → 02:1623:5048 min23:500 min12 Feb
Durban01:46 → 04:1623:460 min23:460 min13 Feb
Dubai03:46 → 06:1600:090 min00:090 min13 Feb
Delhi05:16 → 07:4600:110 min00:110 min13 Feb
Kolkata05:16 → 07:4623:270 min23:260 min13 Feb
Singapore07:46 → 10:1600:550 min00:550 min13 Feb
Sydney10:46 → 13:1600:460 min00:450 min13 Feb
Suva11:46 → 14:1623:570 min23:570 min13 Feb
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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