Re: Time from timestamp?

[Chris Williams via Digitalmars-d-learn]

On Saturday, 31 January 2015 at 00:14:37 UTC, Steven 
Schveighoffer wrote:
On 1/30/15 5:18 PM, Chris Williams wrote:
I'm attempting to print a human-readable version of a 
timestamp. The
timestamp is coming from an external service, via JSON. An 
example is:

1421865781342

Which I know to be:

2015-01-21T18:43:01.342Z


http://dlang.org/phobos/std_datetime.html#.unixTimeToStdTime

It's kind of convoluted because there is no epoch, but you can 
make one:

import std.datetime;
import std.stdio;

void main(string[] args)
{
    // can't make this enum because of time zone...
    auto epoch = SysTime(unixTimeToStdTime(0), UTC());
    writeln(epoch + 1_421_865_781_342.msecs);
}

output:
2015-Jan-21 18:43:01.342Z

Note the reason your code didn't work is because SysTime uses 
1/1/1 as the epoch.

-Steve

D'oh, I missed that in the description:

"and convert it to hnsecs in UTC since midnight, January 1st, 1 
A.D. UTC"

That does explain it. I also didn't spot the declaration of 
unixTimeToStdTime(), which assuredly helps.

Thank you!