Incorrect time and date on Fits images

Astrophotog

How do I correct this? All of my Fits images show the incorrect time and date. This makes no sense when I connect my ASIAIR pro to my iPad it automatically sets correct time and date. So therefore when an image is recorded through ASI air Pro it should have the accurate time, but it does not, how do I fix this?

w7ay

Astrophotog

Are you sure that the date and time are completely wrong, and not UTC?

A FITS image should use UTC; if not, ZWO needs to fix it.

Chen

tech@zwo

Astrophotog
Hello
Is the time advanced or late？several hours？

Astrophotog

Never mind the time and date is correct in the header it is just when I upload it to my computer it shows a different time in the date modified column. But the date in the header is correct.
it would be nice if we had the option to change the order in which the date is shown. Perhaps a way to do month date year order instead of year month date.

w7ay

Astrophotog Perhaps a way to do month date year order instead of year month date.

Again, year-month-day is how the scientific world timestamps.

Chen

Astrophotog

I talked to a friend and I figured it out. Everything is correct. The title of the fit file shows the correct time and date and because asiair uses UTC in the exif and that is what the computer reads, that is why the computer shows a different time. I’m sure if I calculated them out, they would be the same time. One being local time and the other being UTC. Sorry for wasting everyone’s time.

Astrophotog

I am also using the wrong Termanology. I was originally referring to the Fits header, but I was actually talking about the name of the file not the information in the Fits header.
The title name of the file shows the local time. When I opened up the Fits header in pixinsight is shows the UTC time.

Byrdsfan1948

I have the same issue with the time stamps on my subs. Until reading this thread I didn't understand why. In my case even thought all the time settings on my mount and in the ASIair Pro app show as correct local time my subs are stamped as if they were taken at UTC time. In my case that is +5 hours. Aside from adding some confusion when I am loading my subs to stack because often times subs I took the day before, are stamped as if I had taken them today it's no big deal. I can live with this issue :-) Al

guitarmaker

Yes, my FITs files are time/date stamped 7 hours after I take them (I believe). My Autorun Logs have the correct time/date correct. How do I adjust the Fit files to the correct time? I'm in Pacific standard time...

Byrdsfan1948

Guitarmaker I believe our question was answered above here a couple of weeks ago by Chen (w7ay) . Apparently our photo files are time stamped at the time they where taken, using UTC time, rather than than the actual local time, at the location where they were taken. Perhaps the link I've added below can help for you.
I have to assume that Chen (w7ay) is correct when he mentions that this sort of time stamp is consistent with how the scientific world time stamps. However most of us are just hobbyists, not professional astronomers. So it might be helpful if ZWO made the simple program change that would allow those of us us who find this particular time date stamp convention "confusing", to simply disable it, so our photos are time stamped with the local time when taken.
Of course compared to some of the other issues mentioned on this site, this becomes a very trivial issue and once we understand the reason this time stamp it's just a matter of adjusting our thinking to live with it Al

https://www.nhc.noaa.gov/aboututc.shtml