pray-calc/.github/wiki/api/functions/getMscIsha.md

pray-calc v2.1.1

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pray-calc / getMscIsha

Function: getMscIsha()

getMscIsha(date, latitude, shafaq?): number

Defined in: getMSC.ts:133

Compute Isha offset in minutes after sunset using the MCW algorithm.

Three Shafaq modes:

• 'general': blend that reduces hardship at high latitudes (default)
• 'ahmer': based on disappearance of redness (shafaq ahmer)
• 'abyad': based on disappearance of whiteness (shafaq abyad), later

Parameters

date

Date

Observer's local date

latitude

number

Observer latitude in decimal degrees

shafaq?

ShafaqMode = 'general'

Twilight type: 'general' | 'ahmer' | 'abyad'

Returns

number

Minutes after sunset for Isha

Example

const offset = getMscIsha(new Date('2024-06-21'), 40.7128, 'general');
// offset ≈ 84