Q:

Java Date to Epoch, limited by Api 21 (Android) with Java7

I've seen many useful responses on this, but using classes unavailable to me.
I have a correct Date object, and i've tryied different things, but when a review the result here I can see, it's not working.  
I can only use Java7  (or kotlin equivalent)
Here is my current incorrect code:
@JvmStatic fun getEpochNumberFromDate(date: Date):String{

        var calendar : Calendar = Calendar.getInstance()
        calendar.isLenient = false
        calendar.set(date.year, date.day,date.month,date.hours,date.minutes)

        Log.d("zzz","calendar date : "+calendar.timeInMillis.toString())

        Log.d("zzz","year: "+date.year+", month:"+date.month+",  date.time.toString():"+date.time.toString())

        return date.time.toString()
    }

A:

You're overcomplicating it.  There is no need to use a Calendar at all.  Date.getTime() returns milliseconds since epoch.  You just need to divide by 1000.  If you're seeing other differences from that website, it's probably because of timezone issues.

