Obtain duration since last midnight in time zone-CodePudding

I would like to obtain the duration since last midnight in a time zone.

I have tried the following:

estLocation, _ := time.LoadLocation("America/New_York")
nowEST := time.Now().In(estLocation)
midnightEST := nowEST.Truncate(24 * time.Hour)
diff := time.Since(midnightEST)

as well as using Round instead of Truncate.

However, this only sets back the clock by 24h instead of returning the midnight in EST.

How to achieve this?

CodePudding user response：

Get the time for midnight by constructing a time from the date:

loc, _ := time.LoadLocation("America/New_York")
now := time.Now().In(loc)
midnight := time.Date(now.Year(), now.Month(), now.Day(), 0, 0, 0, 0, loc)

Subtract midnight from now to get the duration:

d := now.Sub(midnight)

Run it on the playground. Note that time.Now() is a constant value on the playground.