I have a list of dates (strings) from a delimited text file. All of these times are UTC. E.g 3 seconds past midnight on 1st July UTC
raw_time = 2022-07-01 00:00:03
I have converted this to a date using
my_time = new Date(raw_time)
I wish to test if the dates fall within a range
e.g.
Fri, 01 Jul 2022 00:00:00 GMT
to
Sun, 31 Jul 2022 23:59:59 GMT
The example fails because when I look at
my_time.toUTCString()
I get the result
Thu, 30 Jun 2022 23:00:03 GMT
I should add that I am in the UK on BST (GMT+1)
How can I force the raw date to be converted as a UTC date?
>Solution :
The problem is that your timestamps might be written in UTC timezone, but they are not valid UTC timestamps as per ISO standard: YYYY-MM-DDTHH:mm:ss.sssZ
var myDate = new Date("2022-07-01 00:00:03");
myDate.toUTCString()
//'Thu, 30 Jun 2022 23:00:03 GMT'
var utcDate = new Date("2022-07-01T00:00:03Z"); //note the Z character
utcDate.toUTCString();
//'Fri, 01 Jul 2022 00:00:03 GMT'
The best way to solve the issue would be to update your timestamps file with the correct format. If you for some reason can’t, then you can modify the timestamp on the JS side by changing the string:
//raw_time is "2022-07-01 00:00:03"
const formattedTimestamp = raw_time.replace(' ','T').concat('Z')
// formattedTimestamp becomes "2022-07-01T00:00:03Z"