CreationDate should be in UTC instead of local time

[yscumc]

Currently, the CreationDate is set to the local time. However, pdf clients interpret it as a UTC time.

The code in putInfo should use Date.prototype.getUTC* instead of Date.prototype.get*.

[yscumc]

Wow... that was quick, thanks!

[MrRio]

No worries! :)

[yscumc]

Unfortunately I just tested it with Acrobat X Pro (10.1.10) and it's interpreting the time as local time if no timezone is given.

Originally, I found this problem using Firefox's PDF.JS, which defaults to interpreting as UTC if no timezone is given.

From the PDF 1.3 specs, it looks like "Z" should be appended to the CreationDate if the time given is UTC. However, Acrobat X Pro doesn't like seem to like this either.

After some more testing, I found that the best that works with both Acrobat X Pro and Firefox's PDF.JS is to supply the time in local time and include the timezone information.

var created  = new Date(),
    tzoffset = created.getTimezoneOffset(),
    tzsign   = tzoffset < 0 ? '+' : '-',
    tzhour   = Math.floor(Math.abs(tzoffset / 60)),
    tzmin    = Math.abs(tzoffset % 60),
    tzstr    = [tzsign, padd2(tzhour), "'", padd2(tzmin), "'"].join('');
out(['/CreationDate (D:',
        created.getFullYear(),
        padd2(created.getMonth() + 1),
        padd2(created.getDate()),
        padd2(created.getHours()),
        padd2(created.getMinutes()),
        padd2(created.getSeconds()), tzstr, ')'].join(''));