Closed
Bug 1143398
Opened 10 years ago
Closed 6 years ago
OSX Javascript new Date() initialized with Standard Timezone instead of Daylight Savings for Adelaide / ACDT
Categories
(Core :: JavaScript Engine, defect)
Tracking
()
RESOLVED
DUPLICATE
of bug 1346211
People
(Reporter: jberzins, Unassigned)
References
Details
Attachments
(1 file)
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72.71 KB,
image/png
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Details |
TestDate-Firefox.png
User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.89 Safari/537.36
Steps to reproduce:
Environment
- Macbook Pro retina, 15-inch
- OS X Yosemite: 10.10.2
- Firefox: 35.0.1
- Timezone: Adelaide - Australia
Issue in OS X only, on Windows date calculation works correctly.
Code example:
<html>
<p id="date1"/>
<p id="date2"/>
<script>
var startDate = new Date(621000);
document.getElementById("date1").innerHTML = 'Date: ' + startDate + '\nUTC Year: ' + startDate['getUTCFullYear']();
startDate.setMilliseconds(startDate.getMilliseconds());
startDate.setSeconds(startDate.getSeconds());
document.getElementById("date2").innerHTML = 'Date: ' + startDate + '\nUTC Year: ' + startDate['getUTCFullYear']();
</script>
</html>
Actual results:
During daylight savings in JavaScript new Date() is initialized with Standard Time timezone.
Once setMilliseconds(0) is called timezone value is correctly changed to Daylight Time (+1h).
Effect is that UTC time goes into past.
Output:
Date: Thu Jan 01 1970 09:40:21 GMT+0930 (ACST) UTC Year: 1970
Date: Thu Jan 01 1970 09:40:21 GMT+1030 (ACST) UTC Year: 1969
TestDate-Firefox.png attached.
Expected results:
Expected output from Safari new Date() timezone initialized as Daylight savings:
Date: Thu Jan 01 1970 10:40:21 GMT+1030 (ACDT) UTC Year: 1970
Date: Thu Jan 01 1970 10:40:21 GMT+1030 (ACDT) UTC Year: 1970
The issue can be replicated with Timezone Adelaide till April when Daylight savings end.
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Updated•10 years ago
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Summary: OSX Javascript new Date() intizlized with Standard Timezone instead of Daylight Savings → OSX Javascript new Date() initialized with Standard Timezone instead of Daylight Savings for Adelaide / ACDT
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Updated•10 years ago
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dupe of bug 879261 ?
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Comment 3•9 years ago
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Experiencing this bug as well in El Capitan:
// Sun Nov 01 2015 01:00:00 GMT-0600 (MDT)
var d = new Date(1446361200000);
d.getTime(); // 1446361200000
d.setMilliseconds(0);
d.getTime(); // 1446364800000
This appears to be different from 879261, although the core cause might be the same.
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Comment 4•6 years ago
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Dup'ing forward to bug 1346211 which should have fixed this problem. Please reopen if the issue is still present. Thanks!
Status: UNCONFIRMED → RESOLVED
Closed: 6 years ago
Resolution: --- → DUPLICATE
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Description
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