i have problems getting the right time difference for a given route and a departing and arrival time plus the timezones.
My route is Vienna to Washington D.C. Departing time from Vienna is 10.09.2014 10:25 (vienna time) and arrival time is 10.09.2014 14:20 (washington time)
The timezone for both are Europe/Vienna and US/Eastern.
I use momentjs + momentjs/timezone to get the right values. But momentjs is returning the wrong value in minutes.
The correct value should be 595 Minutes makes 9h 55m.
This is the line i tried:
moment( '10.09.2014 1420', 'DD.MM.YYYY HHmm').tz( 'US/Eastern').diff( moment( '10.09.2014 1025', 'DD.MM.YYYY HHmm').tz( 'Europe/Vienna'), 'minutes');
I tried even with moment.tz( date, format, timezone).diff( ...) but this returns 235 too.
Why it returns 235 ?
You can easily test this on the momentjs.com/timezone site by using the console in your webdev toolbar.
What am i doing wrong here? Both times i have are always local airport time, and i want the time difference in minutes.
Just to close this question.
The timezone data was missing. Be careful when using and building momentjs. Check that you are building including timezone data.
In my case i had to use a specific set of languages too. So i had a custom grunt call in order to build.
Now it works.
Related
I have an todo application and some tasks have deadlines. If deadline is bigger or equal than current date, I want to display them. However, there is a local datetime problem i believe.
This is the current date using 'print(Date())':
2021-07-27 18:53:03 +0000
This is the beginning of that date using 'print(Calendar.current.startOfDay(for: Date()))':
2021-07-26 21:00:00 +0000
As you see, 27th day becomes 26th. I tried timezone operations also. It seems true but day is still starting at 21.00
When I convert them as string and print them, it is ok it show the expected results but without string type it becomes like above. Because of I want to get the bigger or equal days compared to current date , string solution is not working. It is the 27th of day but because of date object it is shown as 26th day and my app showing yesterdays tasks etc.
Can you provide a help for me?
Thanks
In my app I want to print out the duration of time I spent from I made the model until I updated it.
So if I have the value
:created_at set to 2016-04-13 14:00:49 UTC
and
:updated_at set to 2016-04-13 15:05:49 UTC
I want to print out that it took 1hour and 5minutes. (or just 01.05).
How do I do this?
I'm not sure why this was downvoted, though a little googling would probably have gotten you to the right answer fairly quickly.
What you're looking for is called time_ago_in_words
Here is the doc http://apidock.com/rails/ActionView/Helpers/DateHelper/time_ago_in_words
And usage is:
time_ago_in_words #object.created_at
time_ago_in_words #object.updated_at
If you want to use it the console to play with it, make sure you preface it with helper so it's loaded into console
e.g.
helper.time_ago_in_words #object.created_at
update
For checking between 2 dates, not just one date from right now, then you can use distance_of_time_in_words
distance_of_time_in_words(#object.created_at, #object.updated_at)
That gives words like
12 days ago
If you're ONLY looking for hours, and nothing else then you can use basic subtraction and division
#object.updated_at.to_i - #object.created_at.to_i) / 60 / 60
You can try this
diff =#object.updated_at.to_time.to_i - #object.created_at.to_time.to_i
hour = "#{diff / 3600}:#{(diff % 3600) / 60}"
I'm trying to display a simple tableview in IOS with data from Sqlite. My database date is stored as a timestamp. I thought was an unix timestamps but if i try to use dateWithTimeIntervalSince1970 i've really strange result.
Examples of date rows stored:
1352208510267
1352208512266
1352208514266
1352208516266
1352208530266
1352208532265
Use a query like this
SELECT datetime(timestamp, 'unixepoch') from YOURTABLENAME
WHERE id = someId;
This should convert it to some readable value.
Have a look here
I found the answer here. I compared the results with the previous answers:
SELECT strftime('%Y-%m-%d %H:%M:%S', datetime(ZDATE+978307200, 'unixepoch', 'localtime')), datetime(ZDATE, 'unixepoch', 'localtime') FROM ZTABLE
The query with the adjustment for Apple's epoch (Jan 1 2001) gives me the correct date:
"2015-09-29 20:50:51", "1984-09-28 20:50:51"
"2015-09-29 21:03:10", "1984-09-28 21:03:10"
"2015-09-29 21:25:30", "1984-09-28 21:25:30"
Unix timestamps are defined as the number of seconds since Jan 1 1970.
Just now, this would be about 1365525702.
Your values are one thousand times larger, i.e., they are measured in milliseconds.
Decide whether you actually need the millisecond precision, and then add * 1000 or / 1000 at the appropriate places.
My task: I am going to run a contest world wide at my website. A problem setter will set problems from a specific area of the world setting a time and date of starting time of the contest. I have to show that time correctly all over the world so the the contest starts at a time everywhere of the world.
My Idea : I planed to get the time from the problem setter of his time zone using server site language like php time(), & will store to database converting to timezone= zero (0). And who are going to attend the contest I'll just add hour(s) of that time zone with my database time.
Need help: I have no Idea how to convert that timestamps to timezone 'zero', even how can I get the ±hour(s) of current timezone?
Thank you...
Step 1:
Let the user choose his timezone. You could fill a dropdown with values from this site: http://php.net/manual/en/timezones.php
Step 2:
Convert the timezone to servertime
$timezone_client = new DateTimeZone('America/Denver');
$timezone_server = new DateTimeZone('Pacific/Nauru');
$datetime = new DateTime('2013-01-25 12:00:00', timezone_client);
$datetime->setTimezone($timezone_server);
echo $datetime->format('Y-m-d H:i:s');
Timezone 0 = "UTC" (sometimes called GMT)
Your system / language will have a Timezone class, which provides difference to GMT/UTC
I have a start/end times for a calculation I'm trying to do and am having a problem seeing if the end time is before 12AM the day after the start time. Also, I need to calculate how many days past the start time it is.
What I have: Start Date, End Date
What I need:
- How many 'Midnights' is the End Date past the Start Date?
Has anyone done anything like this?
This uses PHP 5.3, if you have an earlier version you may need to use unix timestamps to figure out the difference. The number of midnights should be the number of days difference assuming both start and end times have the same time. So setting both to be midnight of their current day setTime(0,0), should make the calculation correct.
Using the DateTime objects.
$start = new DateTime('2011-03-07 12:23:45');
$end = new DateTime('2011-03-08 1:23:45');
$start->setTime(0,0);
$end->setTime(0,0);
$midnights = $start->diff($end)->days;
Without using the setTime() calls, this would result in 0, because there is less than 24 hours between start and end. With the setTime() this results in 1 because now the difference is exactly 24 hours.
The diff() function was introduced in 5.3 along with the DateInterval class. In 5.2 you can still use the DateTime class but will have to work out the total days using the Unix timestamp.
$midnights = ($end->format('U') - $start->format('U')) / 86400
You can wrap that in an abs() function to the order of start/end does not matter.
Note: These functions may need to be tested for cases that involve DST.
A comment in the php date documentation uses round after dividing by 86400 (number of seconds in a day), to counter any issues that could be involved with DST.
An alternative approach with DateTimes would be to create them in the UTC.
$utcTimezone = new DateTimeZone('UTC');
$start = new DateTime('2011-03-07 12:23:45', $utcTimezone);
$end = new DateTime('2011-03-08 1:23:45', $utcTimezone);