Class OmerEvent

Represents one of the 49 days of counting the Omer between Pesach and Shavuot (16 Nisan through 5 Sivan).

Each day has an associated Sefirah pairing (e.g. Chesed shebiGevurah), a word from Psalm 67 (Lamnatzeach), a letter from verse 5 of Psalm 67, and a word/acrostic from the Ana BeKoach prayer — all accessible via the methods on this class.

Example

import {OmerEvent, HDate, months} from '@hebcal/core';
const ev = new OmerEvent(new HDate(16, months.NISAN, 5784), 1);
ev.render('en');        // '1st day of the Omer'
ev.render('he');        // 'א׳ בָּעוֹמֶר'
ev.sefira('translit');  // 'Chesed shebChesed'
ev.getTodayIs('en');    // 'Today is 1 day of the Omer'

Hierarchy (View Summary)

Event
- OmerEvent

Index

Constructors

constructor

new OmerEvent(date: HDate, omerDay: number): OmerEvent
Constructs an Omer event for a given day (1–49).

Throws RangeError if omerDay is outside 1–49.
Parameters
- date: HDate
  Hebrew date this Omer day is counted on (the evening of)
- omerDay: number
  day of the Omer, 1 through 49
Returns OmerEvent
Overrides Event.constructor
- Defined in src/omer.ts:229

Properties

`Optional`alarm

alarm?: string | boolean | Date

Alarms are used by iCalendar feeds

`Readonly`date

date: HDate

Hebrew date of this event

`Readonly`desc

desc: string

Untranslated title of this event. Note that these description strings are always in English and will remain stable across releases. To get the title of the event in another language, use the render() method.

`Optional`emoji

emoji?: string

Optional emoji character such as ✡️, 🕯️, 🕎, 🕍, 🌒

`Readonly`mask

mask: number

Bitmask of optional event flags. See flags

`Optional`memo

memo?: string

Optional longer description or memo text

`Readonly`omer

omer: number

Methods

basename

basename(): string
Returns a simplified (untranslated) description for this event, suitable for grouping related events under a single name.

For example, HolidayEvent strips qualifiers so that "Erev Pesach" → "Pesach" and "Sukkot III (CH''M)" → "Sukkot". For many events the basename and the event description are identical.

Returns string
Example
```
import {HolidayEvent, HDate, months, flags} from '@hebcal/core';
const ev = new HolidayEvent(
  new HDate(14, months.NISAN, 5784), 'Erev Pesach', flags.EREV);
ev.getDesc();    // 'Erev Pesach'
ev.basename();   // 'Pesach'
```
Inherited from Event.basename
- Defined in src/event.ts:223

getAnaBekoachWord

getAnaBekoachWord(): string
Returns the word from the Ana BeKoach prayer (אָנָּא בְּכֹחַ) corresponding to this Omer day. Ana BeKoach is a 42-word Kabbalistic prayer whose initial letters spell out the 42-letter name of God. The prayer has 7 verses of 6 words each; the 7th entry of each group is the abbreviation of the acrostic letters for that verse (e.g. אב״ג ית״ץ for verse 1). Together the 49 entries (7 verses × 7 entries) align with the 49 days of the Omer, connecting each day to one of the lower seven Sefirot within a Sefirah.

Returns string
a Hebrew word or verse-abbreviation string from Ana BeKoach
Example
```
const ev = new OmerEvent(new HDate(16, 'Nisan', 5785), 1);
ev.getAnaBekoachWord(); // 'אָנָּא' (day 1, first word of verse 1)
```
Example
```
const ev = new OmerEvent(new HDate(22, 'Nisan', 5785), 7);
ev.getAnaBekoachWord(); // 'אב״ג ית״ץ' (day 7, acrostic abbreviation for verse 1)
```
Example
```
const ev = new OmerEvent(new HDate(3, 'Sivan', 5785), 49);
ev.getAnaBekoachWord(); // 'שק״ו צי״ת' (day 49, acrostic abbreviation for verse 7)
```
- Defined in src/omer.ts:398

getCategories

getCategories(): string[]
Returns an array of category strings classifying this event, derived from its flags bitmask. The first element is the broad category (e.g. 'holiday', 'roshchodesh', 'parashat', 'omer'), followed by zero or more refinements (e.g. 'major', 'minor', 'fast').

Returns ['unknown'] if no flag maps to a known category.

Returns string[]
Example
```
import {Event, HDate, flags} from '@hebcal/core';
new Event(new HDate(10, 'Tishrei', 5784), 'Yom Kippur', flags.MAJOR_FAST)
  .getCategories(); // ['holiday', 'major', 'fast']
new Event(new HDate(1, 'Shvat', 5784), 'Rosh Chodesh Sh\'vat', flags.ROSH_CHODESH)
  .getCategories(); // ['roshchodesh']
```
Inherited from Event.getCategories
- Defined in src/event.ts:287

getDate

getDate(): HDate
Hebrew date of this event

Returns HDate
Inherited from Event.getDate
- Defined in src/event.ts:148

getDaysWithinWeeks

getDaysWithinWeeks(): number
Returns number
- Defined in src/omer.ts:319

getDesc

getDesc(): string
Untranslated title of this event. Note that these description strings are always in English and will remain stable across releases. To get the title of the event in another language, use the render() method.

Returns string
Inherited from Event.getDesc
- Defined in src/event.ts:163

getEmoji

getEmoji(): string
Returns an emoji number symbol with a circle, for example ㊲ from the “Enclosed CJK Letters and Months” block of the Unicode standard

Returns string
a single Unicode character from ① through ㊾
Overrides Event.getEmoji
- Defined in src/omer.ts:298

getFlags

getFlags(): number
Bitmask of optional event flags. See flags

Returns number
Inherited from Event.getFlags
- Defined in src/event.ts:169

getLamnatzeachLetter

getLamnatzeachLetter(): string
Returns the letter from verse 5 of Psalm 67 corresponding to this Omer day. Verse 5 (יִשְׂמְחוּ וִירַנְּנוּ לְאֻמִּים…) contains exactly 49 letters, one for each day of the Omer, and is used as a Kabbalistic meditation during the counting.

Returns string
a single Hebrew letter from verse 5 of Psalm 67
Example
```
const ev = new OmerEvent(new HDate(16, 'Nisan', 5785), 1);
ev.getLamnatzeachLetter(); // 'י' (day 1, first letter of verse 5)
```
Example
```
const ev = new OmerEvent(new HDate(3, 'Sivan', 5785), 49);
ev.getLamnatzeachLetter(); // 'ה' (day 49, last letter of verse 5)
```
- Defined in src/omer.ts:375

getLamnatzeachWord

getLamnatzeachWord(): string
Returns the word from Psalm 67 (לַמְנַצֵּחַ, "Lamnatzeach") corresponding to this Omer day. Psalm 67 contains 49 words (excluding its opening verse), one for each day of the Omer. The words are taken from verses 2–8, split on spaces and maqef (־).

Returns string
a Hebrew word from Psalm 67
Example
```
const ev = new OmerEvent(new HDate(16, 'Nisan', 5785), 1);
ev.getLamnatzeachWord(); // 'אֱלֹהִים' (day 1, first word of verse 2)
```
Example
```
const ev = new OmerEvent(new HDate(3, 'Sivan', 5785), 49);
ev.getLamnatzeachWord(); // 'אָרֶץ' (day 49, last word of verse 8)
```
- Defined in src/omer.ts:358

getTodayIs

getTodayIs(locale: string): string
Returns a sentence with that evening's omer count
Parameters
- locale: string
Returns string
a string such as Today is 10 days, which is 1 week and 3 days of the Omer or הַיוֹם עֲשָׂרָה יָמִים, שְׁהֵם שָׁבוּעַ אֶחָד וְשְׁלוֹשָׁה יָמִים לָעוֹמֶר
- Defined in src/omer.ts:327

getWeeks

getWeeks(): number
Returns number
- Defined in src/omer.ts:314

greg

greg(): Date
Gregorian date of this event

Returns Date
Inherited from Event.greg
- Defined in src/event.ts:154

observedIn

observedIn(il: boolean): boolean

Is this event observed in Israel/Diaspora?

Parameters

il: boolean

Returns boolean

Example

const ev1 = new Event(new HDate(7, 'Sivan', 5749), 'Shavuot II', flags.CHAG | flags.CHUL_ONLY);
ev1.observedIn(false); // true
ev1.observedIn(true); // false
const ev2 = new Event(new HDate(26, 'Kislev', 5749), 'Chanukah: 3 Candles', 0);
ev2.observedIn(false); // true
ev2.observedIn(true); // true

observedInDiaspora

observedInDiaspora(): boolean

Is this event observed in the Diaspora?

Returns boolean

Example

const ev1 = new Event(new HDate(7, 'Sivan', 5749), 'Shavuot II', flags.CHAG | flags.CHUL_ONLY);
ev1.observedInDiaspora(); // true
const ev2 = new Event(new HDate(26, 'Kislev', 5749), 'Chanukah: 3 Candles', 0);
ev2.observedInDiaspora(); // true

observedInIsrael

observedInIsrael(): boolean

Is this event observed in Israel?

Returns boolean

Example

const ev1 = new Event(new HDate(7, 'Sivan', 5749), 'Shavuot II', flags.CHAG | flags.CHUL_ONLY);
ev1.observedInIsrael(); // false
const ev2 = new Event(new HDate(26, 'Kislev', 5749), 'Chanukah: 3 Candles', 0);
ev2.observedInIsrael(); // true

render

render(locale?: string): string
Parameters
- Optionallocale: string
  Optional locale name (defaults to empty locale)
Returns string
Overrides Event.render
- Defined in src/omer.ts:274

renderBrief

renderBrief(locale?: string): string
Returns translation of "Omer day 22" without ordinal numbers.
Parameters
- Optionallocale: string
  Optional locale name (defaults to empty locale)
Returns string
Overrides Event.renderBrief
- Defined in src/omer.ts:284

sefira

sefira(lang?: OmerLang): string
Returns the Sefirah pairing associated with this Omer day — one of the seven lower Sefirot within another, calculated as day-within-week of week-within-cycle. For example, on day 8 (week 2, day 1):
- חֶֽסֶד שֶׁבִּגְבוּרָה
- Chesed shebiGevurah
- Lovingkindness within Might
Parameters
- lang: OmerLang = 'en'
  en (English), he (Hebrew with nikud), or translit (Hebrew in Sephardic transliteration)
Returns string
a string such as Lovingkindness within Might or חֶֽסֶד שֶׁבִּגְבוּרָה
Example
```
import {OmerEvent, HDate, months} from '@hebcal/core';
const day8 = new OmerEvent(new HDate(23, months.NISAN, 5784), 8);
day8.sefira('en');        // 'Lovingkindness within Might'
day8.sefira('he');        // 'חֶֽסֶד שֶׁבִּגְבוּרָה'
day8.sefira('translit');  // 'Chesed shebiGevurah'
```
- Defined in src/omer.ts:254

url

url(): string | undefined
Returns a URL to hebcal.com or sefaria.org for more detail on the event, or undefined for events with no detail page.

Subclasses such as HolidayEvent, ChanukahEvent, AsaraBTevetEvent, ParshaEvent, and OmerEvent override this with their own URL patterns.

Returns string | undefined
Overrides Event.url
- Defined in src/omer.ts:337

Class OmerEvent

Example

Hierarchy (View Summary)

Index

Constructors

Properties

Methods

Constructors

constructor

Parameters

Returns OmerEvent

Properties

Optionalalarm

Readonlydate

Readonlydesc

Optionalemoji

Readonlymask

Optionalmemo

Readonlyomer

Methods

basename

Returns string

Example

getAnaBekoachWord

Returns string

Example

Example

Example

getCategories

Returns string[]

Example

getDate

Returns HDate

getDaysWithinWeeks

Returns number

getDesc

Returns string

getEmoji

Returns string

getFlags

Returns number

getLamnatzeachLetter

Returns string

Example

Example

getLamnatzeachWord

Returns string

Example

Example

getTodayIs

Parameters

Returns string

getWeeks

Returns number

greg

Returns Date

observedIn

Parameters

Returns boolean

Example

observedInDiaspora

Returns boolean

Example

observedInIsrael

Returns boolean

Example

render

Parameters

Returns string

renderBrief

Parameters

Returns string

sefira

Parameters

Returns string

Example

url

Returns string | undefined

Settings

On This Page

`Optional`alarm

`Readonly`date

`Readonly`desc

`Optional`emoji

`Readonly`mask

`Optional`memo

`Readonly`omer