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current date
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what's up everybody so in today's video
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I'm going to explain date objects in
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JavaScript date objects are objects that
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contain values that represent dates and
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times these date objects can be changed
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and formatted to suit our needs here's
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an example we will create a date object
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that contains the current date and time
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to do so let's create a constant named
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date date will be an object we will call
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the date Constructor with the new
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keyword date then C in no arguments for
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the current date and time so I'm going
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to
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console.log my date object which gives
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me my current date and time as of right
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now I'm filming this video on a Thursday
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November 9th the year 2023 at about 7:
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in the morning so depending on when
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you're watching this video the date and
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time is going to be different if you
datetime arguments
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would like to create your own custom
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date and time object you'll have to pass
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in some arguments you can follow this
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order for the date Constructor
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the first argument corresponds to a year
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then month day hour minute second and
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milliseconds even so for the year let's
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say
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2024 the month zero corresponds to
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January one is February then that means
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a month of 11 is December let's say
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January so that will be zero for the day
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one for the 1 for the hour uh 2 2 in the
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morning this isn't military time by the
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way for the minute 3 minutes after the
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hour for the seconds 4 seconds after the
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minute we can even add milliseconds if
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we would like so for the milliseconds
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let's say five and here's my new date
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object Monday January 1st 2024 about 2:
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in the morning passing in a string
datetime strings
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representation of time to the date
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Constructor is also valid let's say the
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year is
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2024 January 2nd for the time you're
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going to type t for
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time 12 12 noon then add Z for UTC time
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and there's my new date again Tuesday
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January 2nd 2024 6:00 in the morning
milliseconds since epoch
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another format you can use is within the
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date Constructor pass in a given amount
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of time in Mill seconds since epic if I
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could describe epic I would describe it
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as when the date your computer thinks
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time began if you were to pass in zero
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to the date Constructor you'll be given
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a date and time around December 31st 196
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9 So within the DAT Constructor you can
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pass in a given amount of milliseconds
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since this date so if I was to pass in
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1.7 billion
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milliseconds what I'm telling the day
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Constructor is give me the date and time
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that's 1.7 billion milliseconds since
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that epic date when I pass in 1.7
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billion milliseconds the date that I'm
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given is Tuesday November 14th 2023
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about 400 p.m. passing in milliseconds
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would be good for some sort of timer now
get methods
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let's use the current date and time I
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will pass in no arguments you can
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extract individual values from a date
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object I would like the year const year
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equals take our date object I will use
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the get full year method to get the year
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then I will
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console.log the year and this will be a
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number
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2023 let's get the
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month const month equals our date object
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use the built-in get month method then I
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will
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console.log the
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month currently for me it's November not
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October so remember January is zero
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December is 11 let's get the day const
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day equals date get date not day if you
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get the day that will give you the day
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of the week like Sunday Monday Tuesday
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that sort of thing let's
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console.log the
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day so for me it's the
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9th let's get the hour const hour equals
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date get hours
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plural
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console.log the
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hour for me at 7:00 in the
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morning let's get
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minutes const minutes equals get
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minutes console.log the
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minutes it is 7:45 in the
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morning get
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seconds get
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seconds
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console.log the
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seconds so
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745 21 seconds after the minute now if
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you need the day of the week here's what
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you can do const day of week equals date
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get day that will give you the day of
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the
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week
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console.log day of week for me that is
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for Sunday is zero Monday is one so that
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means it is Thursday now with a date
set methods
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object you can even set the date with a
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method let's
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console.log the
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date I'm going to set the Year date set
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full year I will set the year to be
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2024 yep Saturday November 9th
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2024 let's set the
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month set month
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I will set the month to be January so I
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will pass in zero Tuesday January 9th
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let's set the
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day that would be with set date not day
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I will set it to be the 1 January
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1 the hours with set
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hours let's go with two for 2: in the
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morning set
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minutes 3 minutes P the
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hour set
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seconds 4 seconds past the minute you
compare datetime
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can even compare dates as well let's
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create two date objects const date one
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equals a new date I'll pass in a string
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representation of a date we won't
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include the time though for the year
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let's say
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2023 December that would be 12 31st New
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Year's Eve basically
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and for date
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2 let's say date 2 is New Year's Day
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2024 January
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1st using an if statement let's compare
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to see if date 2 is greater than date
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1 if it is then let's
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console.log happy New
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Year so date 2 is greater than date 1
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will print happy New Year let's change
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date two to be
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2023 December
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30th well nothing happens then but
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that's to be
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expected all right everybody so those
conclusion
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are date objects they're objects that
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contain values that represent dates and
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times these date objects can be changed
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and formatted to suit our needs and well
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everybody those are date objects in
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JavaScript