如何在javascript中比较两种不同格式的两种不同日期？

Question

I am trying to compare two different time formats in JavaScript.

Day 1: Thu Dec 31 00:00:00 GMT 2020

Day 2: Today's date. I am using today=new Date(); which gives me Thu Sep 21 2017 11:42:17 GMT-0400 (Eastern Daylight Time)

I want to check if Day 1 is today or in future, basically if Day 1 >= Day 2. I am only looking for dates and not datetime. Any help is appreciated.

Answer 1

I think this should work

let myDate = Date.parse('Thu Dec 31 00:00:00 GMT 2020')
console.log('myDate:', myDate)

let today  = Date.parse(new Date())
console.log('Today:', today)

if (myDate >= today) {
  console.log("True")
} else {
  console.log("False")
}

If you use Date.parse() it breaks it down into (I believe) epoch time and makes them comparable. This works with a ton of different date formats.