Ruling · Mahāśivarātri (Shivratri) · 1955

Monday 21 February

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 5 min 43 s.

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 Sunday 20 February

Caturdaśī is absent from niśītha. Not taken.

niśītha begins 00:08  00:56 niśītha ends
Caturdaśī begins 01:07:56
23:2023:4400:0800:3200:5601:2001:44

0 of 48 minutes covered

Night of Monday 21 February

Taken. The only night Caturdaśī reaches.

niśītha begins 00:08  00:56 niśītha ends
Caturdaśī ends 00:49:52
23:2023:4400:0800:3200:5601:2001:44

42 of 48 minutes covered, the first 42

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

How it was decided

  1. 01

    Aṅga

    Caturdaśī runs from 01:08 on Mon 21 Feb to 00:50 on Tue 22 Feb.

    1955-02-20T17:07:56Z → 1955-02-21T16:49:52Z

  2. 02

    Kāla

    Niśītha is 1 ghaṭikā either side of midnight: 00:08–00:56 on the 20th, 00:08–00:56 on the 21st.

    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 20th and 42 of 48 on the 21st.

    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 343 s

  5. 05

    Ruling

    Mahāśivarātri, Baoding, 1955: Monday 21 February.

    confidence: determinate

Say it like this

In Baoding, Mahāśivarātri (Shivratri) 1955 falls on Monday 21 February. Caturdaśī runs from 01:08 on Mon 21 Feb to 00:50 on Tue 22 Feb and covers 42 of 48 minutes of niśītha that night.

ahargana.org/baoding/festivals/1955/maha-shivaratri · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 21 Feb
Ahargaṇa, classicalDisc centre, no refractionMon 21 Feb
compat-drikpanchangComparison profileMon 21 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 20thCoveredNiśītha 21stCoveredRuled
Los Angeles09:08 → 08:5023:4348 min23:420 min20 Feb
Chicago11:08 → 10:5023:4048 min23:400 min20 Feb
Jersey City12:08 → 11:5023:4648 min23:460 min20 Feb
Port of Spain13:08 → 12:5023:5648 min23:560 min20 Feb
London17:08 → 16:5023:5048 min23:500 min20 Feb
Durban19:08 → 18:5023:4648 min23:460 min20 Feb
Dubai21:08 → 20:5000:0848 min00:080 min20 Feb
Delhi22:38 → 22:2000:1148 min00:110 min20 Feb
Kolkata22:38 → 22:2023:2648 min23:260 min20 Feb
Singapore00:38 → 00:2000:2435 min00:240 min20 Feb
Sydney03:08 → 02:5023:450 min23:4548 min21 Feb
Suva05:08 → 04:5023:560 min23:5648 min21 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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