dst

I am writing a .Net application that runs on top of an Oracle 11.2.0.2.0 database that stores dates in columns of type "TIMESTAMP(6) WITH LOCAL TIME ZONE". When there is a date stored into the column and it falls within DST, the date is read incorrectly when using the Oracle.ManagedDataAccess library. It appears to always write/update dates correctly. Also, when using the Oracle.DataAccess library, it always handles the dates correctly. In my example I am using timezone 'America/New_York' and date/time of 08/01/2014 12:00:00. Here is a snippet of code that reads the date incorrectly:

I need to check to see if the current date is during daylight savings time. In pseudocode that would be like this: let date = NSDate() if date.isDaylightSavingsTime { print("Success") } I haven't been able to find the solution to this anywhere on the internet. An NSDate alone represents an absolute point in time. To decide if a date is during daylight savings time or not it needs to be interpreted in the context of a time zone . Therefore you'll find that method in the NSTimeZone class and not in the NSDate class. Example: let date = NSDate() let tz = NSTimeZone.localTimeZone() if tz

I'm playing with some C# code to try to gain an understanding of how subtracting DateTime objects in C# works with respect to Daylight Saving Time. Per Google and other sources, the Daylight Saving Time "spring ahead" event in the Eastern Standard Time zone in 2017 was at 2:00am on March 12. So, the first few hours of the day on that date were: 12:00am - 1:00am 1:00am - 2:00am (There was no 2:00am - 3:00am hour due to the "spring ahead") 3:00am - 4:00am So, if I were to calculate the time differential between 1:00am and 4:00am in that time zone on that date, I'd expect the result to be 2 hours

Is a DateTime object not bound by its timestamp? Or does getTimestamp() has some kind of side-effect when used on DST change? Details When setting the timestamp of a DateTime object which is on DST (meaning the formatted time exists both before/after changing the clock) the returned timestamp differs from the set timestamp. $ php --version PHP 7.1.3 (cli) (built: Mar 17 2017 16:59:59) ( NTS ) Copyright (c) 1997-2017 The PHP Group Zend Engine v3.1.0, Copyright (c) 1998-2017 Zend Technologies Reproduce Consider the following php script: date_default_timezone_set('Europe/Berlin'); $date = new

In airflow, everything is supposed to be UTC (which is not affected by DST). However, we have workflows that deliver things based on time zones that are affected by DST. An example scenario: We have a job scheduled with a start date at 8:00 AM Eastern and a schedule interval of 24 hours. Everyday at 8 AM Eastern the scheduler sees that it has been 24 hours since the last run, and runs the job. DST Happens and we lose an hour. Today at 8 AM Eastern the scheduler sees that it has only been 23 hours because the time on the machine is UTC, and doesn't run the job until 9AM Eastern, which is a late