isSameYear()

Determines if one date is in the same year as another date.

This function is valid in v2.20.0 to v2.22.1. This function has been downloaded 6 times.

Parameters

{Date} date1
The date to be compared to date2.
{Date=} date2 Optional, Default:undefined
The date to be compared to date1. If undefined or not specified then a partial function will be returned which will accept date2 as its only parameter.

Returns

{boolean|Function}
If date2 is not given or is undefined a partial function will be returned which will accept date2 as its only parameter. If date1 and date2 are specified then a boolean indicating whether or not they are in the same year will be returned.

Required Functions

This function directly requires the following functions which are included automatically:

  • endOfDay()
    Determines the latest date-time of the year, month, and day of a specific Date object.
  • endOfFridayWeek()
    Determines the latest date-time of the year, month, and week (Friday to Thursday) of a specific Date object.
  • endOfHour()
    Determines the latest date-time of the year, month, day, and hour of a specific Date object.
  • endOfMinute()
    Determines the latest date-time of the year, month, day, hour, and minute of a specific Date object.
  • endOfMondayWeek()
    Determines the latest date-time of the year, month, and week (Monday to Sunday) of a specific Date object.
  • endOfMonth()
    Determines the latest date-time of the year and month of a specific Date object.
  • endOfSaturdayWeek()
    Determines the latest date-time of the year, month, and week (Saturday to Friday) of a specific Date object.
  • endOfSecond()
    Determines the latest date-time of the year, month, day, hour, minute, and second of a specific Date object.
  • endOfSundayWeek()
    Determines the latest date-time of the year, month, and week (Sunday to Saturday) of a specific Date object.
  • endOfThursdayWeek()
    Determines the latest date-time of the year, month, and week (Thursday to Wednesday) of a specific Date object.
  • endOfTuesdayWeek()
    Determines the latest date-time of the year, month, and week (Tuesday to Monday) of a specific Date object.
  • endOfWednesdayWeek()
    Determines the latest date-time of the year, month, and week (Wednesday to Tuesday) of a specific Date object.
  • endOfWeek()
    Determines the latest date-time of the year, month, and week (Sunday to Saturday) of a specific Date object.
  • endOfYear()
    Determines the latest date-time of the year of a specific Date object.
  • isSameDay()
    Determines if one date is in the same year, month and day as another date.
  • isSameFridayWeek()
    Determines if one date is in the same year, month, and week (Friday to Thursday) as another date.
  • isSameHour()
    Determines if one date is in the same year, month, day, and hour as another date.
  • isSameMinute()
    Determines if one date is in the same year, month, day, hour, and minute as another date.
  • isSameMondayWeek()
    Determines if one date is in the same year, month, and week (Monday to Sunday) as another date.
  • isSameMonth()
    Determines if one date is in the same year and month as another date.
  • isSameSaturdayWeek()
    Determines if one date is in the same year, month, and week (Saturday to Friday) as another date.
  • isSameSecond()
    Determines if one date is in the same year, month, day, hour, minute, and second as another date.
  • isSameSundayWeek()
    Determines if one date is in the same year, month, and week (Sunday to Saturday) as another date.
  • isSameThursdayWeek()
    Determines if one date is in the same year, month, and week (Thursday to Wednesday) as another date.
  • isSameTuesdayWeek()
    Determines if one date is in the same year, month, and week (Tuesday to Monday) as another date.
  • isSameWednesdayWeek()
    Determines if one date is in the same year, month, and week (Wednesday to Tuesday) as another date.
  • isSameWeek()
    Determines if one date is in the same year, month, and week (Sunday to Saturday) as another date.
  • spanOfDay()
    Determines the earliest and latest date-times of the year, month, and day of a specific Date object.
  • spanOfFridayWeek()
    Determines the earliest and latest date-times of the year, month, and week (Friday to Thursday) of a specific Date object.
  • spanOfHour()
    Determines the earliest and latest date-times of the year, month, day, and hour of a specific Date object.
  • spanOfMinute()
    Determines the earliest and latest date-times of the year, month, day, hour, and minute of a specific Date object.
  • spanOfMondayWeek()
    Determines the earliest and latest date-times of the year, month, and week (Monday to Sunday) of a specific Date object.
  • spanOfMonth()
    Determines the earliest and latest date-times of the year and month of a specific Date object.
  • spanOfSaturdayWeek()
    Determines the earliest and latest date-times of the year, month, and week (Saturday to Friday) of a specific Date object.
  • spanOfSecond()
    Determines the earliest and latest date-times of the year, month, day, hour, minute, and second of a specific Date object.
  • spanOfSundayWeek()
    Determines the earliest and latest date-times of the year, month, and week (Sunday to Saturday) of a specific Date object.
  • spanOfThursdayWeek()
    Determines the earliest and latest date-times of the year, month, and week (Thursday to Wednesday) of a specific Date object.
  • spanOfTuesdayWeek()
    Determines the earliest and latest date-times of the year, month, and week (Tuesday to Monday) of a specific Date object.
  • spanOfWednesdayWeek()
    Determines the earliest and latest date-times of the year, month, and week (Wednesday to Tuesday) of a specific Date object.
  • spanOfWeek()
    Determines the earliest and latest date-times of the year, month, and week (Sunday to Saturday) of a specific Date object.
  • spanOfYear()
    Determines the earliest and latest date-times of the year of a specific Date object.
  • startOfDay()
    Determines the earliest date-time of the year, month, and day of a specific Date object.
  • startOfFridayWeek()
    Determines the earliest date-time of the year, month, and week (Friday to Thursday) of a specific Date object.
  • startOfHour()
    Determines the earliest date-time of the year, month, day, and hour of a specific Date object.
  • startOfMinute()
    Determines the earliest date-time of the year, month, day, hour, and minute of a specific Date object.
  • startOfMondayWeek()
    Determines the earliest date-time of the year, month, and week (Monday to Sunday) of a specific Date object.
  • startOfMonth()
    Determines the earliest date-time of the year and month of a specific Date object.
  • startOfSaturdayWeek()
    Determines the earliest date-time of the year, month, and week (Saturday to Friday) of a specific Date object.
  • startOfSecond()
    Determines the earliest date-time of the year, month, day, hour, minute, and second of a specific Date object.
  • startOfSundayWeek()
    Determines the earliest date-time of the year, month, and week (Sunday to Saturday) of a specific Date object.
  • startOfThursdayWeek()
    Determines the earliest date-time of the year, month, and week (Thursday to Wednesday) of a specific Date object.
  • startOfTuesdayWeek()
    Determines the earliest date-time of the year, month, and week (Tuesday to Monday) of a specific Date object.
  • startOfWednesdayWeek()
    Determines the earliest date-time of the year, month, and week (Wednesday to Tuesday) of a specific Date object.
  • startOfWeek()
    Determines the earliest date-time of the year, month, and week (Sunday to Saturday) of a specific Date object.
  • startOfYear()
    Determines the earliest date-time of the year of a specific Date object.

Requiring Functions

This function is directly required by the following functions:

  • endOfDay()
    Determines the latest date-time of the year, month, and day of a specific Date object.
  • endOfFridayWeek()
    Determines the latest date-time of the year, month, and week (Friday to Thursday) of a specific Date object.
  • endOfHour()
    Determines the latest date-time of the year, month, day, and hour of a specific Date object.
  • endOfMinute()
    Determines the latest date-time of the year, month, day, hour, and minute of a specific Date object.
  • endOfMondayWeek()
    Determines the latest date-time of the year, month, and week (Monday to Sunday) of a specific Date object.
  • endOfMonth()
    Determines the latest date-time of the year and month of a specific Date object.
  • endOfSaturdayWeek()
    Determines the latest date-time of the year, month, and week (Saturday to Friday) of a specific Date object.
  • endOfSecond()
    Determines the latest date-time of the year, month, day, hour, minute, and second of a specific Date object.
  • endOfSundayWeek()
    Determines the latest date-time of the year, month, and week (Sunday to Saturday) of a specific Date object.
  • endOfThursdayWeek()
    Determines the latest date-time of the year, month, and week (Thursday to Wednesday) of a specific Date object.
  • endOfTuesdayWeek()
    Determines the latest date-time of the year, month, and week (Tuesday to Monday) of a specific Date object.
  • endOfWednesdayWeek()
    Determines the latest date-time of the year, month, and week (Wednesday to Tuesday) of a specific Date object.
  • endOfWeek()
    Determines the latest date-time of the year, month, and week (Sunday to Saturday) of a specific Date object.
  • endOfYear()
    Determines the latest date-time of the year of a specific Date object.
  • isSameDay()
    Determines if one date is in the same year, month and day as another date.
  • isSameFridayWeek()
    Determines if one date is in the same year, month, and week (Friday to Thursday) as another date.
  • isSameHour()
    Determines if one date is in the same year, month, day, and hour as another date.
  • isSameMinute()
    Determines if one date is in the same year, month, day, hour, and minute as another date.
  • isSameMondayWeek()
    Determines if one date is in the same year, month, and week (Monday to Sunday) as another date.
  • isSameMonth()
    Determines if one date is in the same year and month as another date.
  • isSameSaturdayWeek()
    Determines if one date is in the same year, month, and week (Saturday to Friday) as another date.
  • isSameSecond()
    Determines if one date is in the same year, month, day, hour, minute, and second as another date.
  • isSameSundayWeek()
    Determines if one date is in the same year, month, and week (Sunday to Saturday) as another date.
  • isSameThursdayWeek()
    Determines if one date is in the same year, month, and week (Thursday to Wednesday) as another date.
  • isSameTuesdayWeek()
    Determines if one date is in the same year, month, and week (Tuesday to Monday) as another date.
  • isSameWednesdayWeek()
    Determines if one date is in the same year, month, and week (Wednesday to Tuesday) as another date.
  • isSameWeek()
    Determines if one date is in the same year, month, and week (Sunday to Saturday) as another date.
  • spanOfDay()
    Determines the earliest and latest date-times of the year, month, and day of a specific Date object.
  • spanOfFridayWeek()
    Determines the earliest and latest date-times of the year, month, and week (Friday to Thursday) of a specific Date object.
  • spanOfHour()
    Determines the earliest and latest date-times of the year, month, day, and hour of a specific Date object.
  • spanOfMinute()
    Determines the earliest and latest date-times of the year, month, day, hour, and minute of a specific Date object.
  • spanOfMondayWeek()
    Determines the earliest and latest date-times of the year, month, and week (Monday to Sunday) of a specific Date object.
  • spanOfMonth()
    Determines the earliest and latest date-times of the year and month of a specific Date object.
  • spanOfSaturdayWeek()
    Determines the earliest and latest date-times of the year, month, and week (Saturday to Friday) of a specific Date object.
  • spanOfSecond()
    Determines the earliest and latest date-times of the year, month, day, hour, minute, and second of a specific Date object.
  • spanOfSundayWeek()
    Determines the earliest and latest date-times of the year, month, and week (Sunday to Saturday) of a specific Date object.
  • spanOfThursdayWeek()
    Determines the earliest and latest date-times of the year, month, and week (Thursday to Wednesday) of a specific Date object.
  • spanOfTuesdayWeek()
    Determines the earliest and latest date-times of the year, month, and week (Tuesday to Monday) of a specific Date object.
  • spanOfWednesdayWeek()
    Determines the earliest and latest date-times of the year, month, and week (Wednesday to Tuesday) of a specific Date object.
  • spanOfWeek()
    Determines the earliest and latest date-times of the year, month, and week (Sunday to Saturday) of a specific Date object.
  • spanOfYear()
    Determines the earliest and latest date-times of the year of a specific Date object.
  • startOfDay()
    Determines the earliest date-time of the year, month, and day of a specific Date object.
  • startOfFridayWeek()
    Determines the earliest date-time of the year, month, and week (Friday to Thursday) of a specific Date object.
  • startOfHour()
    Determines the earliest date-time of the year, month, day, and hour of a specific Date object.
  • startOfMinute()
    Determines the earliest date-time of the year, month, day, hour, and minute of a specific Date object.
  • startOfMondayWeek()
    Determines the earliest date-time of the year, month, and week (Monday to Sunday) of a specific Date object.
  • startOfMonth()
    Determines the earliest date-time of the year and month of a specific Date object.
  • startOfSaturdayWeek()
    Determines the earliest date-time of the year, month, and week (Saturday to Friday) of a specific Date object.
  • startOfSecond()
    Determines the earliest date-time of the year, month, day, hour, minute, and second of a specific Date object.
  • startOfSundayWeek()
    Determines the earliest date-time of the year, month, and week (Sunday to Saturday) of a specific Date object.
  • startOfThursdayWeek()
    Determines the earliest date-time of the year, month, and week (Thursday to Wednesday) of a specific Date object.
  • startOfTuesdayWeek()
    Determines the earliest date-time of the year, month, and week (Tuesday to Monday) of a specific Date object.
  • startOfWednesdayWeek()
    Determines the earliest date-time of the year, month, and week (Wednesday to Tuesday) of a specific Date object.
  • startOfWeek()
    Determines the earliest date-time of the year, month, and week (Sunday to Saturday) of a specific Date object.
  • startOfYear()
    Determines the earliest date-time of the year of a specific Date object.