dst

问题 i'm a little lost in the timezone :) I have data stored with the time in UTC. The server is in the Netherlands, so we live in utc+1 (now, with daylightsavingtime, in utc + 2) Now a client says: give me the data from august 5th. So i have to calculate the utc time from 'his time'. For that i have to know: what is your utc offset (we stored that in his profile, let's say utc -6) are you in daylightsavingtime (because then we have to add +1 and make the utc offset -5) Then my questions: Can i

问题 I need to offset the time by an hour if it's currently DST in the Pacific Time Zone. How can I determine the current daylight savings status of the Pacific Time Zone, regardless of the user's local timezone? Here's what I have so far. "dst" in line 4 is just a placeholder for a function that would tell me if daylight savings time is active in that zone. function checkTime() { var d = new Date(); var hour = d.getUTCHours(); var offset = dst ? 7 : 8; // is pacific time currently in daylight

问题 I have a code as follows: from django.utils.timezone import get_current_timezone, make_aware make_aware(some_datetime, get_current_timezone()) The make_aware call occasionally raises AmbiguousTimeError: 2013-11-03 01:23:17 I know from the Django docs that this is a daylight savings problem, and that this timestamp is in fact ambiguous. Now how do i resolve it (say to the first of the two possible times this could be)? 回答1: Prophylactics You should avoid naive datetimes in the first place

问题 A specific bank has branches in all major cities in the world. They all open at 10:00 AM local time. If within a timezone that uses DST, then of course the local opening time also follows the DST-adjusted time. So how do I go from the local time to the utc time. What I need is a function to_utc(localdt, tz) like this: Arguments: localdt: localtime, as naive datetime object, DST-adjusted tz: timezone in the TZ-format, e.g. 'Europe/Berlin' Returns: datetime object, in UTC, timezone-aware EDIT:

问题 Does C# take Daylight savings time into consideration when converting between timezones? I have a source date which is in the current time in London, and I want to convert it to my timezone (CET). Here's the code I'm using. DateTime time = DateTime.ParseExact(timeString, "HH:mm", null); time = DateTime.SpecifyKind(time, DateTimeKind.Unspecified); //Convert it to the right timezone. It is currently in GMT TimeZoneInfo gmt = TimeZoneInfo.FindSystemTimeZoneById("GMT Standard Time"); TimeZoneInfo

问题 I am working with xslt and using the fn:current-dateTime( ) to get the current date time (https://www.w3.org/TR/xpath-functions/#func-current-dateTime). The time returned is in UTC. I need to convert this to PST. I see that the fn:adjust-dateTime-to-timezone (http://www.xqueryfunctions.com/xq/fn_adjust-datetime-to-timezone.html) can be used to perform the timezone conversion. But i see that this function accepts the timeZone argument in the form of offset, i.e -PT8H for Pacific timezone while

问题 I would like to insert time data type in postgresql that includes the timezone and is aware of daylight savings time. This is what I have done: CREATE TABLE mytable( ... start_time time(0) with time zone, end_time time(0) with time zone ) INSERT INTO mytable(start_time, end_time) VALUES(TIME '08:00:00 MST7MDT', TIME '18:00:00 MST7MDT') I get the following error: invalid input syntax for type time: "08:00:00 MST7MDT" It works if I use 'MST' instead of 'MST7MDT', but I need it to be aware of

问题 I'm building an application which will be able to send emails at any specific local time to any place in the world. For example, my daily schedule (localtime): 8:00 AM - Send email to John in Toronto, Canada 9:15 AM Western Standard Time (Australia) - Send email to Bob in Perth, Australia 10:12 PM - Send email to Anas in Rabat, Morocco I want to be able to execute this code on and Amazon EC2 server in a single location (e.g. São Paulo, Brasil). I also know that Toronto is in Eastern Standard

问题 I have reviewed several pytz -related questions here, but none seems to address the exact problem I'm seeing. Following the pytz documentation, here's a loop to print the current time in multiple time zones, including time zone offset, time zone name, and whether the datetime object thinks it's DST. nowDT = datetime.datetime.now() chicagoTz = pytz.timezone('America/Chicago') chicagoDT = chicagoTz.normalize(chicagoTz.localize(nowDT)) sys.stdout.write( "%-10s %-35s %s\n" % ('Chicago', chicagoDT

问题 What's the task? By project specification i need to calculate DST rules for specific time zone offsets. Rules cannot be applied via standard instruments like date_default_timezone_set() because we can't rely on software configuration and can't get it updated if some DST rules will be changed. What i have? In situations when DST switch date is on the last week and the switch day of the last week is on the next month i need to decrement the number of the last week. For now i have only one ugly