dst

问题 How do I check if daylight saving time is in effect? 回答1: You can use time.localtime and look at the tm_isdst flag in the return value. >>> import time >>> time.localtime() (2010, 5, 21, 21, 48, 51, 4, 141, 0) >>> _.tm_isdst 0 Using time.localtime() , you can ask the same question for any arbitrary time to see whether DST would be (or was) in effect for your current time zone. 回答2: The accepted answer is fine if you are running code on your laptop, but most python applications are running on

问题 I have CSV data files with timestamped records that are in local time. Unfortunately the data files cover the period where daylight saving time changes (Nov 3rd 2013) so the time component of the timestamps for the records go: 12:45, 1:00, 1:15, 1:30, 1:45, 1:00, 1:15, 1:30, 1:45, 2:00 . I want to be able to convert and store the values in the database as UTC. Unfortunately the standard DateTime.Parse() function of .NET will parse as this (all November 3rd 2013): | Time String | Parsed Local

问题 This is a bit of my JS code for which this is needed: var secDiff = Math.abs(Math.round((utc_date-this.premiere_date)/1000)); this.years = this.calculateUnit(secDiff,(86400*365)); this.days = this.calculateUnit(secDiff-(this.years*(86400*365)),86400); this.hours = this.calculateUnit((secDiff-(this.years*(86400*365))-(this.days*86400)),3600); this.minutes = this.calculateUnit((secDiff-(this.years*(86400*365))-(this.days*86400)-(this.hours*3600)),60); this.seconds = this.calculateUnit((secDiff-

问题 I\'m storing events in my database. I have \'start\' and \'end\' date times, \'tickets_start\' and \'tickets_end\' (for when ticket sales actually start/end - as opposed to the start/end of the actual event). So far, I\'ve built methods that do all the fun stuff like converting the date/times to GMT before saving, then back to their respective timezone for display. I\'m storing the timezone in a varchar field with values like \"America/New_York\". But - now I need to start dealing with if the

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed last year . I am hoping to make this question and the answers to it the definitive guide to dealing with daylight saving time, in particular for dealing with the actual change overs. If you have anything to add, please do Many systems are dependent on keeping accurate time, the problem is with