time wrong on sdcard images in Ubuntu, okay on camera and Windows











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when i take a picture and put the sdcard in my Ubuntu 18.10, the picture date is 6-hrs ago. but if i look at it in my panasonic camera, the time is correct. if i look at it in windows, the time is correct. if i try a different camera, a canon, and different sdcard, same thing, 6-hrs earlier. date and time on Ubuntu is correct. date and time on the cameras are correct. i tried formatting the sdcards. what's going on?



this picture was taken at 8:03pm, but properties says modified at 2:03pm, exif data says correctly 8:03pm.
screenshot



My time zone is CST, central.










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  • What's your local time zone?
    – Kulfy
    Dec 1 at 2:40












  • CST, central. i double-checked that setting
    – ticotexas
    Dec 1 at 4:33















up vote
2
down vote

favorite












when i take a picture and put the sdcard in my Ubuntu 18.10, the picture date is 6-hrs ago. but if i look at it in my panasonic camera, the time is correct. if i look at it in windows, the time is correct. if i try a different camera, a canon, and different sdcard, same thing, 6-hrs earlier. date and time on Ubuntu is correct. date and time on the cameras are correct. i tried formatting the sdcards. what's going on?



this picture was taken at 8:03pm, but properties says modified at 2:03pm, exif data says correctly 8:03pm.
screenshot



My time zone is CST, central.










share|improve this question
























  • What's your local time zone?
    – Kulfy
    Dec 1 at 2:40












  • CST, central. i double-checked that setting
    – ticotexas
    Dec 1 at 4:33













up vote
2
down vote

favorite









up vote
2
down vote

favorite











when i take a picture and put the sdcard in my Ubuntu 18.10, the picture date is 6-hrs ago. but if i look at it in my panasonic camera, the time is correct. if i look at it in windows, the time is correct. if i try a different camera, a canon, and different sdcard, same thing, 6-hrs earlier. date and time on Ubuntu is correct. date and time on the cameras are correct. i tried formatting the sdcards. what's going on?



this picture was taken at 8:03pm, but properties says modified at 2:03pm, exif data says correctly 8:03pm.
screenshot



My time zone is CST, central.










share|improve this question















when i take a picture and put the sdcard in my Ubuntu 18.10, the picture date is 6-hrs ago. but if i look at it in my panasonic camera, the time is correct. if i look at it in windows, the time is correct. if i try a different camera, a canon, and different sdcard, same thing, 6-hrs earlier. date and time on Ubuntu is correct. date and time on the cameras are correct. i tried formatting the sdcards. what's going on?



this picture was taken at 8:03pm, but properties says modified at 2:03pm, exif data says correctly 8:03pm.
screenshot



My time zone is CST, central.







sd-card time






share|improve this question















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edited Dec 1 at 17:04









pomsky

27.9k1185111




27.9k1185111










asked Dec 1 at 2:22









ticotexas

111




111












  • What's your local time zone?
    – Kulfy
    Dec 1 at 2:40












  • CST, central. i double-checked that setting
    – ticotexas
    Dec 1 at 4:33


















  • What's your local time zone?
    – Kulfy
    Dec 1 at 2:40












  • CST, central. i double-checked that setting
    – ticotexas
    Dec 1 at 4:33
















What's your local time zone?
– Kulfy
Dec 1 at 2:40






What's your local time zone?
– Kulfy
Dec 1 at 2:40














CST, central. i double-checked that setting
– ticotexas
Dec 1 at 4:33




CST, central. i double-checked that setting
– ticotexas
Dec 1 at 4:33










1 Answer
1






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up vote
2
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The FAT filesystem does not store the timezone, and the specification does not say whether timestamps should be taken as UTC (as on any other filesystem) or as local time. Windows interprets timestamps on FAT filesystems as being in the current local timezone. Linux, by default, interprets them as UTC.



Example: The timestamp on the file says 8:03. Linux believes this to be UTC. Your local timezone is 6 hours behind (that is, west of) UTC, so Linux displays this as 2:03 local time.



Mount the filesystem with -o time_offset=-360 to tell the kernel that timestamps on the FAT filesystem are to be considered 6 hours behind UTC. See the manual page of the mount command for details.






share|improve this answer





















  • thanks, makes sense now. but the sdcard seems to automount when it is inserted. do i need to mount it again elsewhere with the time_offset each time i insert it? or is there a way to make the time_offset permanent?
    – ticotexas
    Dec 1 at 18:04










  • @ticotexas: Yep. sudo umount /dev/sdb1 && sudo mount -o uid=$(id -u),gid=$(id -g),quiet,fmask=0133,dmask=0022,time_offset=-360 /dev/sdb1 /mnt should do the trick. Replace /dev/sdb1 as needed and /mnt according to taste. If your locale has daylight saving time then when daylight saving time is in effect you may want to replace -360 with -300. Remember to sudo umount /dev/sdb1 before removing the card.
    – AlexP
    Dec 1 at 18:39













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1 Answer
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1 Answer
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active

oldest

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active

oldest

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active

oldest

votes








up vote
2
down vote













The FAT filesystem does not store the timezone, and the specification does not say whether timestamps should be taken as UTC (as on any other filesystem) or as local time. Windows interprets timestamps on FAT filesystems as being in the current local timezone. Linux, by default, interprets them as UTC.



Example: The timestamp on the file says 8:03. Linux believes this to be UTC. Your local timezone is 6 hours behind (that is, west of) UTC, so Linux displays this as 2:03 local time.



Mount the filesystem with -o time_offset=-360 to tell the kernel that timestamps on the FAT filesystem are to be considered 6 hours behind UTC. See the manual page of the mount command for details.






share|improve this answer





















  • thanks, makes sense now. but the sdcard seems to automount when it is inserted. do i need to mount it again elsewhere with the time_offset each time i insert it? or is there a way to make the time_offset permanent?
    – ticotexas
    Dec 1 at 18:04










  • @ticotexas: Yep. sudo umount /dev/sdb1 && sudo mount -o uid=$(id -u),gid=$(id -g),quiet,fmask=0133,dmask=0022,time_offset=-360 /dev/sdb1 /mnt should do the trick. Replace /dev/sdb1 as needed and /mnt according to taste. If your locale has daylight saving time then when daylight saving time is in effect you may want to replace -360 with -300. Remember to sudo umount /dev/sdb1 before removing the card.
    – AlexP
    Dec 1 at 18:39

















up vote
2
down vote













The FAT filesystem does not store the timezone, and the specification does not say whether timestamps should be taken as UTC (as on any other filesystem) or as local time. Windows interprets timestamps on FAT filesystems as being in the current local timezone. Linux, by default, interprets them as UTC.



Example: The timestamp on the file says 8:03. Linux believes this to be UTC. Your local timezone is 6 hours behind (that is, west of) UTC, so Linux displays this as 2:03 local time.



Mount the filesystem with -o time_offset=-360 to tell the kernel that timestamps on the FAT filesystem are to be considered 6 hours behind UTC. See the manual page of the mount command for details.






share|improve this answer





















  • thanks, makes sense now. but the sdcard seems to automount when it is inserted. do i need to mount it again elsewhere with the time_offset each time i insert it? or is there a way to make the time_offset permanent?
    – ticotexas
    Dec 1 at 18:04










  • @ticotexas: Yep. sudo umount /dev/sdb1 && sudo mount -o uid=$(id -u),gid=$(id -g),quiet,fmask=0133,dmask=0022,time_offset=-360 /dev/sdb1 /mnt should do the trick. Replace /dev/sdb1 as needed and /mnt according to taste. If your locale has daylight saving time then when daylight saving time is in effect you may want to replace -360 with -300. Remember to sudo umount /dev/sdb1 before removing the card.
    – AlexP
    Dec 1 at 18:39















up vote
2
down vote










up vote
2
down vote









The FAT filesystem does not store the timezone, and the specification does not say whether timestamps should be taken as UTC (as on any other filesystem) or as local time. Windows interprets timestamps on FAT filesystems as being in the current local timezone. Linux, by default, interprets them as UTC.



Example: The timestamp on the file says 8:03. Linux believes this to be UTC. Your local timezone is 6 hours behind (that is, west of) UTC, so Linux displays this as 2:03 local time.



Mount the filesystem with -o time_offset=-360 to tell the kernel that timestamps on the FAT filesystem are to be considered 6 hours behind UTC. See the manual page of the mount command for details.






share|improve this answer












The FAT filesystem does not store the timezone, and the specification does not say whether timestamps should be taken as UTC (as on any other filesystem) or as local time. Windows interprets timestamps on FAT filesystems as being in the current local timezone. Linux, by default, interprets them as UTC.



Example: The timestamp on the file says 8:03. Linux believes this to be UTC. Your local timezone is 6 hours behind (that is, west of) UTC, so Linux displays this as 2:03 local time.



Mount the filesystem with -o time_offset=-360 to tell the kernel that timestamps on the FAT filesystem are to be considered 6 hours behind UTC. See the manual page of the mount command for details.







share|improve this answer












share|improve this answer



share|improve this answer










answered Dec 1 at 5:44









AlexP

7,36711228




7,36711228












  • thanks, makes sense now. but the sdcard seems to automount when it is inserted. do i need to mount it again elsewhere with the time_offset each time i insert it? or is there a way to make the time_offset permanent?
    – ticotexas
    Dec 1 at 18:04










  • @ticotexas: Yep. sudo umount /dev/sdb1 && sudo mount -o uid=$(id -u),gid=$(id -g),quiet,fmask=0133,dmask=0022,time_offset=-360 /dev/sdb1 /mnt should do the trick. Replace /dev/sdb1 as needed and /mnt according to taste. If your locale has daylight saving time then when daylight saving time is in effect you may want to replace -360 with -300. Remember to sudo umount /dev/sdb1 before removing the card.
    – AlexP
    Dec 1 at 18:39




















  • thanks, makes sense now. but the sdcard seems to automount when it is inserted. do i need to mount it again elsewhere with the time_offset each time i insert it? or is there a way to make the time_offset permanent?
    – ticotexas
    Dec 1 at 18:04










  • @ticotexas: Yep. sudo umount /dev/sdb1 && sudo mount -o uid=$(id -u),gid=$(id -g),quiet,fmask=0133,dmask=0022,time_offset=-360 /dev/sdb1 /mnt should do the trick. Replace /dev/sdb1 as needed and /mnt according to taste. If your locale has daylight saving time then when daylight saving time is in effect you may want to replace -360 with -300. Remember to sudo umount /dev/sdb1 before removing the card.
    – AlexP
    Dec 1 at 18:39


















thanks, makes sense now. but the sdcard seems to automount when it is inserted. do i need to mount it again elsewhere with the time_offset each time i insert it? or is there a way to make the time_offset permanent?
– ticotexas
Dec 1 at 18:04




thanks, makes sense now. but the sdcard seems to automount when it is inserted. do i need to mount it again elsewhere with the time_offset each time i insert it? or is there a way to make the time_offset permanent?
– ticotexas
Dec 1 at 18:04












@ticotexas: Yep. sudo umount /dev/sdb1 && sudo mount -o uid=$(id -u),gid=$(id -g),quiet,fmask=0133,dmask=0022,time_offset=-360 /dev/sdb1 /mnt should do the trick. Replace /dev/sdb1 as needed and /mnt according to taste. If your locale has daylight saving time then when daylight saving time is in effect you may want to replace -360 with -300. Remember to sudo umount /dev/sdb1 before removing the card.
– AlexP
Dec 1 at 18:39






@ticotexas: Yep. sudo umount /dev/sdb1 && sudo mount -o uid=$(id -u),gid=$(id -g),quiet,fmask=0133,dmask=0022,time_offset=-360 /dev/sdb1 /mnt should do the trick. Replace /dev/sdb1 as needed and /mnt according to taste. If your locale has daylight saving time then when daylight saving time is in effect you may want to replace -360 with -300. Remember to sudo umount /dev/sdb1 before removing the card.
– AlexP
Dec 1 at 18:39




















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