https://bugzilla.wikimedia.org/show_bug.cgi?id=16763
Summary: Present list of matching timezone locations based on
client offset
Product: MediaWiki
Version: unspecified
Platform: All
URL: http://en.wikipedia.org/wiki/Special:Preferences
OS/Version: All
Status: NEW
Severity: enhancement
Priority: Normal
Component: User preferences
AssignedTo: [email protected]
ReportedBy: [email protected]
With bug 505 fixed, users will now be able to specify a zoneinfo timezone name
(such as "America/Los_Angeles") in place of a manually-calculated offset
("-08:00").
This is good, but the list of places is long -- 445 entries currently come up
in the list available on my test installation. Even if localization of names is
added, the list isn't super easy to pick from.
For a long time we've had a button to fill in the offset from the client
computer's settings via JavaScript, but this only gives us the current offset;
we need a zone location to handle DST transitions.
It would, however, be possible to show a restricted list which matches the
client settings. For instance a match for -08:00 in December would require only
picking from:
+---------------------+
| America/Dawson |
| America/Ensenada |
| America/Los_Angeles |
| America/Tijuana |
| America/Vancouver |
| America/Whitehorse |
| Pacific/Pitcairn |
+---------------------+
At the moment (December 2008), the biggest list would be for UTC+1, which comes
up with 46 locations in Africa and Europe.
Here's a breakdown, with some locations just for fun:
+---------+----------+
| minutes | count(*) |
+---------+----------+
| -660 | 5 |
| -600 | 7 | <- Hawaii
| -570 | 1 |
| -540 | 5 |
| -480 | 7 | <- US west coast
| -420 | 12 |
| -360 | 23 |
| -300 | 36 | <- US east coast
| -270 | 1 |
| -240 | 33 |
| -210 | 1 |
| -180 | 18 |
| -120 | 21 |
| -60 | 3 |
| 0 | 30 | <- UK
| 60 | 46 | <- Europe
| 120 | 40 |
| 180 | 21 | <- Moscow
| 210 | 1 |
| 240 | 9 |
| 270 | 1 |
| 300 | 12 |
| 330 | 3 |
| 345 | 1 |
| 360 | 12 |
| 390 | 2 |
| 420 | 11 | <- Australia west coast (DST)
| 480 | 21 | <- China
| 540 | 10 | <- Japan, Korea, Australia east coast (DST)
| 570 | 2 |
| 585 | 1 |
| 600 | 10 |
| 630 | 4 |
| 660 | 17 |
| 690 | 1 |
| 720 | 10 | <- New Zealand (DST)
| 780 | 5 |
| 825 | 1 |
| 840 | 1 |
+---------+----------+
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