TL;DR: You should always store datetimes in UTC and convert to proper timezone on display.
A timezone offset refers to how many hours the timezone is from Coordinated Universal Time (UTC). The offset of UTC is
+00:00, and the offset of
Asia/Taipei timezone is
UTC+08:00 (you could also present it as
GMT+08:00). Basically, there is no perceptible difference between Greenwich Mean Time (GMT) and UTC.
The local time subtracts the offset of its timezone is UTC time. For instance,
Asia/Taipei minuses timezone offset
10:00+00:00, 10 o'clock of UTC. On the other hand, UTC time pluses local timezone offset is local time.
Python DateTime to Unix timestamp 13 digits. Now, we can see DateTime to Unix timestamp 13 digits in python. In this example, I have imported modules like time and datetime.; The datetime.datetime.now is used to get the present time. Get Current Date and Time. Import datetime datetimeobject = datetime.datetime.now.
A date in Python is not a data type of its own, but we can import a module named datetime to work with dates as date objects. DateTime objects also provide access to their value in a float format usable with the python time module, provided that the value of the object falls in the range of the epoch-based time module.
到底是 GMT+8 還是 UTC+8？
Show System Timezone
Find Timezones Of A Certain Country
datetime would be present as local timezone but without
tzinfo, so it is buggy.
datetime object contains no timezone information. The
datetime_obj.tzinfo will be set to
None if the object is naive. Actually,
datetime objects without timezone should be considered as a 'bug' in your application. It is up for the programmer to keep track of which timezone users are working in.
Python Datetime Gmt To Utc
datetime object embeds a timezone information. Rules of thumb for timezone in Python:
- Always work with 'offset-aware'
- Always store datetime in UTC and do timezone conversion only when interacting with users.
- Always use ISO 8601 as input and output string format.
There are two useful methods:
pytz.utc.localize(naive_dt) for converting naive
datetime to timezone be offset-aware, and
aware_dt.astimezone(pytz.timezone('Asia/Taipei')) for adjusting timezones of offset-aware objects.
You should avoid
naive_dt.astimezone(some_tzinfo) which would be converted to aware datetime as system timezone then convert to
For working with
pytz, it is recommended to call
tz.localize(naive_dt) instead of
dt.replace(tzinfo=tz) does not handle daylight savings time correctly.
Python Get Gmt Time
Naive and aware
datetime objects are not comparable.
Parse String to Datetime
python-dateutil usually comes in handy.
Convert Datetime To Unix Timestamp
Parse Unix Timestamp To Datetime
Scala ide sbt. The path from SBT to Scala-IDE is well described in many places: Start with an SBT project; Add the SBT plugin definition: addSbtPlugin('com.typesafe.sbteclipse'% 'sbteclipse-plugin'% '2.1.0-RC1') Run the 'eclipse' command from within SBT; Open Eclipse with an installed Scala-IDE add-on; Import the project; What is the reverse for this? Build.sbt is a Scala-based DSL to express parallel processing task graph. Typos in build.sbt will be caught as a compilation error.
Store Datetime In Databases
- MySQL lets developers decide what timezone should be used, and you should convert datetime to UTC before saving into database.
- MongoDB assumes that all the timestamp are in UTC, and you have to normalize datetime to UTC.
Datetime Python Utc
Sample output of above program.
Time in MST: 2017-01-19 06:06:14.495605-07:00
Time in EST: 2017-01-19 08:06:14.496606-05:00
Time in UTC: 2017-01-19 13:06:14.496606+00:00
Time in GMT: 2017-01-19 13:06:14.496606+00:00
Time in HST: 2017-01-19 03:06:14.497606-10:00