1155096 - getDate() returns incorrect value for some dates in Moscow timezone on Linux

Status: RESOLVED FIXED

(Core :: JavaScript Engine, defect)

Description

[Istvan Halmen]

User Agent: Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.118 Safari/537.36

Steps to reproduce:

1. Open Firefox on a Linux Machine
2. Set the system timezone to Moscow
3. Write the following code in the console: new Date(1981, 2, 32).getDate()


Actual results:

It returns 31



Expected results:

It should return 1

It happens for specific years only, confirmed for 1981,1982,1983,1984.
For other timezones the returned value is correct

Comment 1

[André Bargull [:anba]]

Fixed in https://hg.mozilla.org/mozilla-central/rev/b7ef07909cc4


Before (Ubuntu):
new Date(1981, 2, 32).getDate()
31
new Date(1982, 2, 32).getDate()
31
new Date(1983, 2, 32).getDate()
31
new Date(1984, 2, 32).getDate()
31


After (Ubuntu):
new Date(1981, 2, 32).getDate()
1
new Date(1982, 2, 32).getDate()
1
new Date(1983, 2, 32).getDate()
1
new Date(1984, 2, 32).getDate()
1