parseDate sets the time forward by an hour for non DST date time

[c-shetty]

Hello @rxaviers. parseDate seems to have an issue in parsing a non-DST date time. The issue happens when the local machine's date is the same as the DST start date. Following are the steps I followed to reproduce,

• Manually set the machine timezone to Eastern Time(UTC - 5) [I don't observe DST so had to do this manually]
• Manually set the machine date to 12(Jan or Feb doesn't matter) [March 12th is when DST starts in 2023].
• Run the following code,

var en = Globalize( "en" );
var date = "3/2/2023, 2:00 AM";
en.parseDate(date, { skeleton: "yMdhm" });

Expected result: Thu Mar 02 2023 02:00:00 GMT-0500 (Eastern Standard Time)
Actual result: Thu Mar 02 2023 03:00:00 GMT-0500 (Eastern Standard Time)

Similarly for 24hours format,

var en = Globalize( "en" );
var date = "3/2/2023, 2:00 PM";
en.parseDate(date, { skeleton: "yMdhm" });

Expected result: Thu Mar 02 2023 14:00:00 GMT-0500 (Eastern Standard Time)
Actual result: Thu Mar 02 2023 15:00:00 GMT-0500 (Eastern Standard Time)

[rxaviers]

Please, can you provide additional info? What do you get when formatting such dates? Can you also share the ISO string of the dates you're using (to format)? Thanks

[c-shetty]

@rxaviers

var iso = "2023-03-02T07:00:00.000Z";
var dateToFormat = new Date(iso); // Thu Mar 02 2023 02:00:00 GMT-0500 (Eastern Standard Time)
var formattedDate = Globalize.formatDate(dateToFormat, { skeleton: "yMdhm" });
var parsedDate = Globalize.parseDate(formattedDate, { skeleton: "yMdhm" });

console.log("Formatted date : " + formattedDate);
console.log("Parsed date : " + parsedDate);

Output when the machine's date is Feb 12:

Formatted date : 3/2/2023, 2:00 AM
Parsed date: Thu Mar 02 2023 03:00:00 GMT-0500 (Eastern Standard Time)

Output when the machine's date is other than 12 [I used Feb 11]:

Formatted date : 3/2/2023, 2:00 AM
Parsed date : Thu Mar 02 2023 02:00:00 GMT-0500 (Eastern Standard Time)