timezone

问题 For 2016 Turkish Government decided to stay GMT+3 timezone to save daylight, but on android: Calendar calendar = Calendar.getInstance(); TimeZone tz = TimeZone.getTimeZone("UTC"); calendar.setTimeInMillis(timestamp * 1000); Date currentTimeZone = (Date) calendar.getTime(); calendar.add(Calendar.MILLISECOND, tz.getOffset(calendar.getTimeInMillis())); So the problem is; it's showing GMT+3 for the date before November: Wed Oct 26 18:00:00 GMT+03:00 2016 but for after November: Mon Nov 07 20:00

问题 I currently have table in a MySQL database which has a startDate and endDate which are both timestamps . This is linked to the code using hibernate. I can return these by using the following HQL SELECT startDate, endDate FROM Reservation where id = :id What I am trying to do is return these dates based on a given timezone. I know MySQL has a function CONVERT_TZ which can return the dates based on a given timezone, I'm wondering if HQL has a similar function? I know HQL has a TIMESTAMP_WITH

问题 I am new to db world. I am sending a datetime value such as '2016-04-27 09:00:00' from java program, for getting it saved into mysql database. My question is that How will this value be saved into datetime type of field in mysql db table. I mean, whether It'll be stored as string as I have passed or mysql will parse the string, and constructs UTC timestamp out of it and store that number into db. Moreover, Will this stored value be retrieved as it is from java program, irrespective of

问题 I am new to db world. I am sending a datetime value such as '2016-04-27 09:00:00' from java program, for getting it saved into mysql database. My question is that How will this value be saved into datetime type of field in mysql db table. I mean, whether It'll be stored as string as I have passed or mysql will parse the string, and constructs UTC timestamp out of it and store that number into db. Moreover, Will this stored value be retrieved as it is from java program, irrespective of

问题 I am new to db world. I am sending a datetime value such as '2016-04-27 09:00:00' from java program, for getting it saved into mysql database. My question is that How will this value be saved into datetime type of field in mysql db table. I mean, whether It'll be stored as string as I have passed or mysql will parse the string, and constructs UTC timestamp out of it and store that number into db. Moreover, Will this stored value be retrieved as it is from java program, irrespective of

问题 If I run a snippet like: bool areTheyTheSame = DateTime.UtcNow == DateTime.Now what will I get? Does the DateTime returned know its timezone such that I can compare? My specific problem is that I'm trying to build a cache-like API. If it takes a DateTime AbsoluteExpiration, do I have to enforce that users of my API know whether to give me a UTC time or a timezone-based time? [Edit] This SO question is extremely relevant to my issue as well: Cache.Add absolute expiration - UTC based or not?

问题 I have two databases running on different servers in different timezones. There is a couple of tables which contains timestamp with timezone . I need to dump data from one database and to import it to another with correct timestamp and correct timezone. I use following command to dump data: pg_dump -a DB_NAME > dump.sql I see data are in old timestamp and timezone format: 2013-11-29 14:30:00+02 Then I use command to another server to restore dump: psql -d DB_NAME -f dump.sql And I see that

问题 I'm using the .net TimeZoneInfo FindSystemTimeZoneById method which I understand queries the registry. Are the values for Time Zone ID strings stored in the registry at "HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Time Zone" dependent on the language of the Windows installation of the machine? The registry key contains a value called "Display Name" so it would make sense for this to be the language specific one, but I can't find out if this is the case (short of installing

问题 I have more than 1 million datetime object from database, and I want to convert each of them to timezone-aware datetime objects. Here is my helper funcion conv_tz: # dt is python datetime object, src_tz and dest_tz and pytz.timezone objects def conv_tz(dt, src_tz, dest_tz): if not dt: return None sdt = src_tz.localize(dt) return sdt.astimezone(dest_tz) Here is the result from the profiler: ncalls tottime percall cumtime percall filename:lineno(function) 1101475 1.166 0.000 44.440 0.000 ..

问题 I'm using mongoose models to save my records including created and updated dates. Here's my model schema: var CasesModelSchema = new mongoose.Schema( { caseId: Number, sessionId: String, createdAt: {type: Date}, updatedAt: {type: Date, default: Date.now}, docs: mongoose.Schema.Types.Mixed }, { collection: 'cases' } ); The problem I'm facing is that the updatedAt field saves the datetime as ISODate("2017-04-24T12:40:48.193Z") , which is in UTC, but my server's timezone is Asia/Calcutta . Since