IsoDateString wrong parse which date before start unix time

[isikhi]

In the following articles, you say that we can convert the date to iso date string and send it, but the values before 1970 cannot be parse correctly. so the ones before unix start time are not parse correctly. as an example "1961-04-14T00: 00: 00.000Z" When I send this isodate string to a proper with the mixpanel set, when I enter the mixpanel web panel, a data of 2097 comes to just i use .toISOString() function. help.mixpanel.com/hc/en-us/articles/115004547203-Manage-Timezones-for-Projects-in-Mixpanel https://help.mixpanel.com/hc/en-us/articles/115004547203-Manage-Timezones-for-Projects-in-Mixpanel