tzinfo

Extends Ok, we are not having a good day today. When you attach the correct tzinfo object to a datetime instance, and then you strftime() it, it STILL comes out in UTC, seemingly ignoring the beautiful tzinfo object I attached to it. # python 2.5.4 now = datetime.now() print now.strftime( "%a %b %d %X" ) # %X is "locale's appropriate time rep" pst = now.replace( tzinfo=Pacific ) print pst.strftime( "%a %b %d %X" ) We get: Mon Jan 18 17:30:16 Mon Jan 18 17:30:16 I found if I add %z, I can add the difference its supposed to have computed: Mon Jan 18 17:32:38 Mon Jan 18 17:32:38 -0800 It just

How do I set the timezone of a datetime instance that just came out of the datastore? When it first comes out it is in UTC. I want to change it to EST. I'm trying, for example: class Book( db.Model ): creationTime = db.DateTimeProperty() When a Book is retrieved, I want to set its tzinfo immediately: book.creationTime.tzinfo = EST Where I use this example for my EST object However I get: attribute 'tzinfo' of 'datetime.datetime' objects is not writable I've seen a number of answers that recommend pytz and python-dateutil, but I really want an answer to this question. datetime 's objects are

Is there a way to extract the moment of historic leap seconds from the time-zone database that is distributed on most linux distributions? I am looking for a solution in python, but anything that works on the command line would be fine too. My use case is to convert between gps-time (which is basically the number of seconds since the first GPS-satellite was switched on in 1980) and UTC or local time. UTC is adjusted for leap-seconds every now and then, while gps-time increases linearly. This is equivalent to converting between UTC and TAI . TAI also ignores leap-seconds, so TAI and gps-time

Using '%z' pattern of datetime.strptime() I have a string text that represent a date and I'm perfectly able to parse it and transform it into a clean datetime object: date = "[24/Aug/2014:17:57:26" dt = datetime.strptime(date, "[%d/%b/%Y:%H:%M:%S") Except that I can't catch the entire date string with the timezone using the %z pattern as specified here date_tz = 24/Aug/2014:17:57:26 +0200 dt = datetime.strptime(date, "[%d/%b/%Y:%H:%M:%S %z]") >>> ValueError: 'z' is a bad directive in format '[%d/%b/%Y:%H:%M:%S %z]' Because as this bug report says strftime() is implemented per platform I

I have created a new application using Ruby on Rails v4.1.0. When attempting to start a server or console on Windows, I am encountering the following error: $ rails server Booting WEBrick Rails 4.1.0 application starting in development on .... Exiting c:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/tzinfo-1.1.0/lib/tzinfo/data_source.rb:199: in `rescue in create_default_data_source': No timezone data source could be found. To resolve this, either install TZInfo::Data (e.g. by running `gem install tzinfo-data`) or specify a zoneinfo directory using `TZInfo::DataSource.set(:zoneinfo,