Incorrect datetime UTCLeapSeconds conversion

7 views (last 30 days)
I am working with leap second data, and as part of the calculations I did this for a particular leap second:
dt1 = datetime(1972,6,30,23,59,60,'TimeZone','UTCLeapSeconds')
dt1 = datetime
1972-06-30T23:59:60.000Z
dt2 = datetime(dt1,'TimeZone','UTCLeapSeconds')
dt2 = datetime
1972-06-30T23:59:59.000Z
dt2.TimeZone
ans = 'UTCLeapSeconds'
dt1 - dt2
ans = duration
00:00:01
Well, you can see what happened. Even though the input and output time zones are both 'UTCLeapSeconds', the datetime( ) function has changed the time of this and jumped backwards 1 second. So to get around this I am forced to write code like this:
if( isequal(dt1.TimeZone,'UTCLeapSeconds') )
dt2 = dt1
else
dt2 = datetime(dt1,'TimeZone','UTCLeapSeconds')
end
dt2 = datetime
1972-06-30T23:59:60.000Z
dt1 - dt2
ans = duration
00:00:00
Looks like a bug to me, but does someone have another explanation for why this might be happening?

Answers (1)

Cris LaPierre
Cris LaPierre on 7 Aug 2023
Edited: Cris LaPierre on 7 Aug 2023
Potentially a bug, which you can report here: https://www.mathworks.com/support/contact_us.html
It looks like you have applied the time zone twice. You can do this instead:
dt1 = datetime(1972,6,30,23,59,60,'TimeZone','UTCLeapSeconds')
dt1 = datetime
1972-06-30T23:59:60.000Z
dt2 = dt1
dt2 = datetime
1972-06-30T23:59:60.000Z
dt2.TimeZone
ans = 'UTCLeapSeconds'
dt1 - dt2
ans = duration
00:00:00

Categories

Find more on Loops and Conditional Statements in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!