how do I get an iso formated local date that matches my OS's one in js?

@corn flour you know...

21 Replies

venegoOP•2y ago

so Date().toISOString() is utc. and I'm in utc+1 I need to add an hour. how do I do so, It's fine for me to manipulate dates to get the right one for me but I don't wanna manipulate strings

cornflour•2y ago

just as confirmation so you want the format yyyy-mm-ddThh:mm:ss in local time right?

venegoOP•2y ago

I actually want a space instead of T. but it's a problem. so yes. that'll work

cornflour•2y ago

you got pretty close, just that month needs to +1 because month start at 0 and if you are not completely attached to yyyy-mm-dd, maybe look into Intl.DateTimeFormat (theres also formateToParts which can return an array of the parts of the string instead)

venegoOP•2y ago

I guess Intl could be my only option besides using linux posix tools I'll try Intl. the first example on my machine is not shifted by month but 2 days forwards. which is really weird.

cornflour•2y ago

can you show me the code?

venegoOP•2y ago

      const date = new Date();
      const anotherDate = new Date(
        date.getFullYear(),
        date.getMonth(),
        date.getDay(),
        date.getHours(),
        date.getMinutes(),
        date.getSeconds()
      );
      console.log(anotherDate)
      // output: 3 days in the future then -1 an hour

      console.log(Intl.DateTimeFormat(undefined, {
        year: 'numeric',
        month: 'numeric',
        day: 'numeric',
        hour: 'numeric',
        minute: 'numeric',
        second: 'numeric'
      }).format(date))
      // output: accurate

      const date = new Date();
      const anotherDate = new Date(
        date.getFullYear(),
        date.getMonth(),
        date.getDay(),
        date.getHours(),
        date.getMinutes(),
        date.getSeconds()
      );
      console.log(anotherDate)
      // output: 3 days in the future then -1 an hour

      console.log(Intl.DateTimeFormat(undefined, {
        year: 'numeric',
        month: 'numeric',
        day: 'numeric',
        hour: 'numeric',
        minute: 'numeric',
        second: 'numeric'
      }).format(date))
      // output: accurate

can I get an absolute date(without the PM/AM) with Intl

venegoOP•2y ago

oh I can.

venegoOP•2y ago

worked

venegoOP•2y ago

I just have to deal with the weird m/d/y

cornflour•2y ago

you can yes and the first one should be getDate, not getDay (which returns the day of the week) im not sure about the -1 hour since i cant replicate it

venegoOP•2y ago

unless it's behind by two months and and two days forwards???? idk, this is confusing oh getDate worked thanks. I'll stick to the first one and add an hour

cornflour•2y ago

just out of curiosity, does this have 1 hour off to you?

  const formatDate = (d) => {
  const year = d.getFullYear()
  const month = d.getMonth() + 1
  const date = d.getDate()
  const h = d.getHours()
  const m = d.getMinutes()
  const s = d.getSeconds()
  return `${year}-${month}-${date} ${h}:${m}:${s}`
}

console.log(formatDate(new Date()))

  const formatDate = (d) => {
  const year = d.getFullYear()
  const month = d.getMonth() + 1
  const date = d.getDate()
  const h = d.getHours()
  const m = d.getMinutes()
  const s = d.getSeconds()
  return `${year}-${month}-${date} ${h}:${m}:${s}`
}

console.log(formatDate(new Date()))

venegoOP•2y ago

no it's accurate. hmm interesting and why the date is behind by month(before you add 1)?

cornflour•2y ago

because getMonth returns month starting at 0 for whatever reason

venegoOP•2y ago

why are these two different in the hour?

      // hours in 0 utc
      const accDate = new Date(
        date.getFullYear(),
        date.getMonth(),
        date.getDate(),
        date.getHours() + 1,
        date.getMinutes(),
        date.getSeconds()
      );
 
      // hours match  local time
      const formatDate = (d) => {
        const year = d.getFullYear();
        const month = d.getMonth() + 1;
        const date = d.getDate();
        const h = d.getHours();
        const m = d.getMinutes();
        const s = d.getSeconds();
        return `${year}-${month}-${date} ${h}:${m}:${s}`;
      };

      // hours in 0 utc
      const accDate = new Date(
        date.getFullYear(),
        date.getMonth(),
        date.getDate(),
        date.getHours() + 1,
        date.getMinutes(),
        date.getSeconds()
      );
 
      // hours match  local time
      const formatDate = (d) => {
        const year = d.getFullYear();
        const month = d.getMonth() + 1;
        const date = d.getDate();
        const h = d.getHours();
        const m = d.getMinutes();
        const s = d.getSeconds();
        return `${year}-${month}-${date} ${h}:${m}:${s}`;
      };

maybe because 30 and 31 difference in months????

cornflour•2y ago

i have no clue what you mean the new Date i created works fine with my local time

venegoOP•2y ago

maybe you're utc 0. I'm in +1.

cornflour•2y ago

nah im in PST

venegoOP•2y ago

~~i'ts just a coincidence in your case.~~ oh??? that is weird

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how do I get an iso formated local date that matches my OS's one in js?