Your first method seems to be the approved one, and should be DST-aware. You could shorten it a tiny bit, since pytz.utc = pytz.timezone(‘UTC’), but you knew that already 🙂 tz = timezone(‘US/Pacific’) def toUTC(d): return tz.normalize(tz.localize(d)).astimezone(pytz.utc) print “Test: “, datetime.datetime.utcnow(), ” = “, toUTC(datetime.datetime.now())
tl;dr You asked: I was looking for a one-liner like: Ask and ye shall receive. Convert from terrible legacy class Date to its modern replacement, Instant. myJavaUtilDate.toInstant().toString() 2020-05-05T19:46:12.912Z java.time In Java 8 and later we have the new java.time package built in (Tutorial). Inspired by Joda-Time, defined by JSR 310, and extended by the ThreeTen-Extra … Read more
The .NET framework already has classes and methods available to convert DateTimes between different time zones. Have a look at the ConvertTime methods of the TimeZoneInfo class. Edit: When you get the time to put into the database, assuming it was created with correct time zone information you can easily convert to UTC: DateTime utcTime … Read more
GMT does not adjust for Daylight saving time (DST). You can hear it from the horse’s mouth on this web site. Add this line of code to see the source of the problem: Console.WriteLine(TimeZoneInfo.FindSystemTimeZoneById(“GMT Standard Time”).SupportsDaylightSavingTime); Output: True. This is not a .NET problem, it is Windows messing up. The registry key that TimeZoneInfo uses … Read more
They’re for different purposes. UTC is the primary time standard by which the world regulates clocks and time. ISO is standard format time. ISO also supports ms in its format. So if you want to send data to the server, send the ISO, because ISO is the standard format: var date = new Date(); sendDate(date.toISOString()); … Read more
Java: int offset = TimeZone.getDefault().getRawOffset() + TimeZone.getDefault().getDSTSavings(); long now = System.currentTimeMillis() – offset; Kotlin: val offset: Int = TimeZone.getDefault().rawOffset + TimeZone.getDefault().dstSavings val now: Long = System.currentTimeMillis() – offset
date(‘Z’); returns the UTC offset in seconds.
You can use SELECT SYS_EXTRACT_UTC(TIMESTAMP ‘2000-03-28 11:30:00.00 -02:00’) FROM DUAL; You may also need to change your timezone ALTER SESSION SET TIME_ZONE = ‘Europe/Berlin’; Or read it SELECT SESSIONTIMEZONE, CURRENT_TIMESTAMP FROM dual;
Same way as you would in Java: val timestamp: Long = System.currentTimeMillis / 1000
Run this to obtain a naive datetime in UTC (and to add five minutes to it): >>> from datetime import datetime, timedelta >>> datetime.utcnow() datetime.datetime(2021, 1, 26, 15, 41, 52, 441598) >>> datetime.utcnow() + timedelta(minutes=5) datetime.datetime(2021, 1, 26, 15, 46, 52, 441598) If you would prefer a timezone-aware datetime object, run this in Python 3.2 … Read more