Date functions

The Date functions provide methods for creating date objects and getting various properties of the objects. The DateAdd() and DateDiff() functions are convenient for adjusting the desired date based on a specified interval. The Now() function may also be used to get the current time in the local time of the client.

Date

This function has 3 signatures:

• Date(year, month, day, hour?, minute?, second?, millisecond?) -> Date
• Date(epoch?) -> Date
• Date(timestamp?) -> Date

Date(year, month, day, hour?, minute?, second?, millisecond?) -> Date

Function bundle: Core

Parses a value or set of values to a Date object. Dates that are manually created are assumed to be UTC. See the example snippets below to view various ways this function may be used.

Parameters

• year: Number - A number representing a year.
• month: Number - The month (0-11) where 0 is January and 11 is December.
• day: Number - The day of the month (1-31).
• hour (Optional): Number - The hour of the day (0-23).
• minute (Optional): Number - The minute of the hour (0-59).
• second (Optional): Number - The second of the minute (0-59).
• millisecond (Optional): Number - The millisecond of the second (0-999).

Return value: Date

Examples

Year, month, day

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Date(1987,05,02) // 'Tue Jun 02 1987 00:00:00 GMT-0700 (PDT)'

Prints the current date and time

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Date()

Date(epoch?) -> Date

Function bundle: Core

Converts a Unix epoch number to a Date object.

Parameter

• epoch (Optional): Number - The number of milliseconds since January 1, 1970 UTC.

Return value: Date

Examples

Returns a date object based on a field value

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var recordDate = Date($feature.dateField)

Milliseconds since epoch

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Date(1476987783555) // 'Thu Oct 20 2016 11:23:03 GMT-0700 (PDT)'

Date(timestamp?) -> Date

Function bundle: Core

Converts an ISO 8601 text value to a Date object.

Parameter

• timestamp (Optional): Text - An ISO 8601 text value to be converted into a date.

Return value: Date

Example

ISO 8601 text value

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Date('2016-10-20T17:41:37+00:00') // 'Thu Oct 20 2016 10:41:37 GMT-0700 (PDT)'

DateAdd

DateAdd(dateValue, addValue, units?) -> Date

Function bundle: Core

Adds a specified amount of time in the given units to a date and returns a new date.

Parameters

• dateValue: Date - The input date to which to add time.
• addValue: Number - The value to add to the date in the given units.
• units (Optional): Text - The units of the number to add to the date. Default is 'milliseconds. The supported unit types include milliseconds, seconds, minutes, hours, days, months, years`

Return value: Date

Example

Adds 7 days to the date in the provided field

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var startDate = Date($feature.dateField);
var oneWeekLater = DateAdd(startDate, 7, 'days');
return oneWeekLater;

DateDiff

DateDiff(date1, date2, units?) -> Number

Function bundle: Core

Subtracts two dates, and returns the difference in the specified units.

Parameters

• date1: Date - The date value from which to subtract a second date.
• date2: Date - The date value to subtract from the first given date.
• units (Optional): Text - The units in which to return the difference of the two given dates. The supported unit types include milliseconds, seconds, minutes, hours, days, months, years. The default value is milliseconds.

Return value: Number

Example

Subtracts two dates and returns the age

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var startDate = Date($feature.startDateField);
var endDate = Date($feature.endDateField);
var age = DateDiff(endDate, startDate, 'years');
return age;

Day

Day(dateValue) -> Number

Function bundle: Core

Returns the day of the month of the given date.

Parameter

• dateValue: Date - A date value from which to get the day of the month.

Return value: Number

Example

Gets the day of the month of the current date

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Day(Now())

Hour

Hour(dateValue) -> Number

Function bundle: Core

Returns the hour of the time in the given date (0-23).

Parameter

• dateValue: Date - A date value from which to get the hour of the time.

Return value: Number

Example

Gets the hour of the current time

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Hour(Now())

ISOMonth

ISOMonth(dateValue) -> Number

Since version 1.12

Function bundle: Core

Returns the month of the given date, based on the ISO 8601 standard. Values range from 1-12 where January is 1 and December is 12.

Parameter

• dateValue: Date - A date value from which to get the month.

Return value: Number

Example

Gets the month of the given date, based on the ISO 8601 standard. Returns 12, for the month of December.

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ISOMonth(Date(1980, 11, 31))

ISOWeek

ISOWeek(dateValue) -> Number

Since version 1.12

Function bundle: Core

Returns the week in the year of the given date, based on the ISO 8601 week date calendar. Values range from 1-53 where the first week of the year is 1 and the last week of the year is 52 or 53, depending on the year.

Parameter

• dateValue: Date - A date value from which to get the week.

Return value: Number

Example

Gets the week of the given date, based on the ISO 8601 standard. Returns 1, since this date is included in the first week of the following year.

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ISOWeek(Date(1980, 11, 31))

ISOWeekday

ISOWeekday(dateValue) -> Number

Since version 1.12

Function bundle: Core

Returns the day of the week of the given date, based on the ISO 8601 standard. Values range from 1-7 where Monday is 1 and Sunday is 7.

Parameter

• dateValue: Date - A date value from which to return the day of the week.

Return value: Number

Example

Returns the day of the week of the given date, based on the ISO 8601 standard. Returns 3, for Wednesday.

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ISOWeekday(Date(1980, 11, 31))

ISOYear

ISOYear(dateValue) -> Number

Since version 1.12

Function bundle: Core

Returns the year of the given date based on the ISO 8601 week date calendar.

Parameter

• dateValue: Date - A date value from which to get the year.

Return value: Number

Example

Gets the year of the given date, based on the ISO 8601 week date calendar. Returns 1981, since this date is included in the first week of the following year.

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ISOYear(Date(1980, 11, 31))

Millisecond

Millisecond(dateValue) -> Number

Function bundle: Core

Returns the millisecond of the time in the date.

Parameter

• dateValue: Date - A date value from which to get the millisecond of the time.

Return value: Number

Example

Gets the millisecond of the current time

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Millisecond(Now())

Minute

Minute(dateValue) -> Number

Function bundle: Core

Returns the minute of the time in the given date.

Parameter

• dateValue: Date - A date value from which to get the minute of the time.

Return value: Number

Example

Gets the minute of the current time

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Minute(Now())

Month

Month(dateValue) -> Number

Function bundle: Core

Returns the month of the given date. Values range from 0-11 where January is 0 and December is 11.

Parameter

• dateValue: Date - A date value from which to get the month.

Return value: Number

Example

Gets the month of the given Date. Returns 11, for the month of December.

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Month(Date(1980, 11, 31))

Now

Now() -> Date

Function bundle: Core

Returns the current date and time in the local time of the client.

Return value: Date

Example

Returns the current date and time, e.g. Mon Oct 24 2016 12:09:34 GMT-0700 (PDT)

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Now()

Second

Second(dateValue) -> Number

Function bundle: Core

Returns the second of the time in the date.

Parameter

• dateValue: Date - A date value from which to get the second of the time.

Return value: Number

Example

Gets the second of the current time

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Second(Now())

Timestamp

Timestamp() -> Date

Since version 1.1

Function bundle: Core

Returns the current date and time in UTC time.

Return value: Date

Example

Returns the current date and time in UTC time, e.g. 29 Mar 2017 08:37:33 pm

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Timestamp()

Today

Today() -> Date

Function bundle: Core

Returns the current date in the local time of the client.

Return value: Date

Example

Returns the current date with time truncated, e.g. Mon Oct 24 2016 00:00:00 GMT-0700 (PDT)

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Today()

ToLocal

ToLocal(utcDate) -> Date

Since version 1.1

Function bundle: Core

Converts the given UTC date to a date value in the local time of the client.

Parameter

• utcDate: Date - A UTC date value to convert to the local time of the client. This value is assumed to be in UTC time.

Return value: Date

Example

Convert a UTC date to the local time of the client running the app, e.g. Mon Oct 24 2016 00:00:00 GMT-0700 (PDT)

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ToLocal(Timestamp())

ToUTC

ToUTC(localDate) -> Date

Since version 1.1

Function bundle: Core

Converts the given date value from the client's local time to UTC time. Date values in Arcade are already assumed to be UTC. Sometimes dates in databases are stored in local time. Use this function to normalize dates stored in local time with other dates created in Arcade expressions.

Parameter

• localDate: Date - A date value in local time to convert to UTC time. This value is assumed to be in local time.

Return value: Date

Example

Returns the current date and time in UTC, e.g. 29 Mar 2017 08:37:33 pm

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// 29 Mar 2017 01:37:33 pm
Now()
// 29 Mar 2017 08:37:33 pm
ToUTC(Now())

Week

Week(dateValue, startDay?) -> Number

Since version 1.14

Function bundle: Core

Returns the week number in the year of the given date. Values range from 0-53 where the first week of the year is 0 and the last week of the year is 51, 52, or 53, depending on the year. The first and last weeks may not be a full seven days in length.

Parameters

• dateValue: Date - A date value from which to get the week.
• startDay (Optional): Number - A number representing the start day of the week. Sunday = 0; Monday = 1; Tuesday = 2; Wednesday = 3; Thursday = 4; Friday = 5; Saturday = 6. The default is 0 (Sunday).

Return value: Number

Examples

Use the default start of the week (Sunday)

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Week( Date(1974,0,3) )
// Returns 0

Set start of week to Thursday

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Week( Date(1974,0,3), 4 )
// Returns 1

Set start of week to Friday

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Week( Date(1974,0,3), 5 )
// Returns 0

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Week( Date(1945,8,23) )
// Returns 38

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Week( Date(2022,7,20) )
// Returns 33

Weekday

Weekday(dateValue) -> Number

Function bundle: Core

Returns the day of the week of the given date. Values range from 0-6 where Sunday is 0 and Saturday is 6.

Parameter

• dateValue: Date - A date value from which to return the day of the week.

Return value: Number

Example

Returns the day of the week of the given date. Returns 3, for Wednesday.

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Weekday(Date(1980, 11, 31))

Year

Year(dateValue) -> Number

Function bundle: Core

Returns the year of the given date.

Parameter

• dateValue: Date - A date value from which to get the year.

Return value: Number

Example

Gets the year of the current date

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Year(Now())