zoneinfo | 易学教程

Python 3.9: Construct DST valid timestamp using standard library

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问题 I would like to contruct DST-valid timestamps only using the standard library in Python 3.9 and was hoping this was possible with this version. In my timezone "Europe/Berlin", the DST crossings for 2020 are: 2020-03-29 at 02:00 the clock switches to 03:00 (there is no hour 2!) 2020-10-25 at 03:00 the clock switches back to 02:00 (the hour 2 exists two times!) My script yields the following output: MARCH 2020-03-29 01:59:00+01:00 CET plus 1 h: 2020-03-29 02:59:00+01:00 CET (should be 03:59:00

How can i convert time zone string to the TimeZone Object in java?

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问题 I hava serval time zone strings in utc format, such as "UTC+08:00", "UTC-05:00", the question is how can i convert these utc format strings to the TimeZone Object(java.util.TimeZone) in java? i have tried to convert by zoneId as follows, but did not work: ZoneId zoneId = ZoneId.of("UTC+08:00"); TimeZone timeZone = TimeZone.getTimeZone(zoneId); i know TimeZone timeZone = TimeZone.getTimeZone("Asia/Shanghai"); would work, but i do not know the mapping between "UTC+08:00" and "Asia/Shanghai" 回答1

How can i convert time zone string to the TimeZone Object in java?

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zoneinfo data corrupt, how do I compile new data?

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问题 Basically the same thing happened again as when I asked this question. However this time I cannot get it right again. I tried the answer of Burhan Khalid again and I get the same errors again. I also tried copy pasting the zoneinfo folder from a backup again, but this time it did not fix my errors. Version of Django = 1.4.5 Version of Celery = 3.0.8 Version of Django-Celery = 3.0.6 Version of pytz = 2013b (same as the files I am downloading) OS = Mac Mountain Lion Attempt 1: Clear the

Detect if ZONEINFO fails in Go

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问题 In Go, you can specify a specific zoneinfo.zip file to be used by adding a ZONEINFO environment variable that points to the specific file you'd like to use for time zone information. This is great as it allows me to ensure that the versions of the IANA time zone database that I'm using on my front-end and my back-end are the same. However, there does not appear to be any way to detect if use of the specified zone info file has failed. Looking at the source code (https://golang.org/src/time

Handling timezones in MySQL without zoneinfo

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问题 There seems to be no way to get MySQL to return formatted times from timestamps without zoneinfo being imported. If I use SET time_zone = '-4:00' and I create a timestamp for 6:00PM Nov 1, when daylight saving time passes, and the timezone changes to -5:00, that event will no longer be displayed at the correct time. Is it possible to load timezone data from the application? Or do I need to get all of my timestamps as UNIX timestamps and convert them in the application? If so, that would

How do I determine the system's Olson zoneinfo in JavaScript?

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问题 I'm interested in retrieving the current zoneinfo string ("America/Los Angeles", "Europe/London", etc.) that the user currently has set for their OS in JavaScript. I've found how to get the current offset in seconds, offsets at specific dates, and less exact time zones (PST, etc.) but not the Olson zoneinfo. Is this possible? 回答1: I worked on this very issue a couple of months back and the result is this: http://site.pageloom.com/automatic-timezone-detection-with-javascript. The script will

How do I determine the system's Olson zoneinfo in JavaScript?

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I'm interested in retrieving the current zoneinfo string ("America/Los Angeles", "Europe/London", etc.) that the user currently has set for their OS in JavaScript. I've found how to get the current offset in seconds, offsets at specific dates, and less exact time zones (PST, etc.) but not the Olson zoneinfo. Is this possible? I worked on this very issue a couple of months back and the result is this: http://site.pageloom.com/automatic-timezone-detection-with-javascript . The script will not give you the most precise result possible. For example, it will return Europe/Berlin regardless of where

as.POSIXct gives an unexpected timezone

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问题 I'm trying to convert a yearmon date (from the zoo package) to a POSIXct in the UTC timezone. This is what I tried to do: > as.POSIXct(as.yearmon("2010-01-01"), tz="UTC") [1] "2010-01-01 01:00:00 CET" I get the same when I convert a Date: > as.POSIXct(as.Date("2010-01-01"),tz="UTC") [1] "2010-01-01 01:00:00 CET" The only way to get it to work is to pass a character as an argument: > as.POSIXct("2010-01-01", tz="UTC") [1] "2010-01-01 UTC" I looked into the documentation of DateTimeClasses,