The times displayed by Tinytag Explorer are calculated
when the data is displayed and depend on the daylight
saving settings of the PC at that time.
For example, if a .ttd file is opened before and after DST
settings change, then all times displayed by Tinytag Explorer will
go forward or back.
The advantage of this approach is that the relative time
information is always correct. For example if a logger is
set to record once every 24 hours and is left running during a DST
transition all the timestamps will be 24 hours apart.
Unfortunately, this approach means historic data may
appear wrong if DST has changed since the data was
recorded. For example, a .ttd file from a logger that
records every 18:00 GMT in the winter will display 18:00 when
viewed in the winter but 19:00 when viewed during the summer.
Please note: describing how the data is displayed by Tinytag
Explorer on PC's in countries that apply different DST rules to
those where the logger was launched is beyond the scope of this
article. Please contact us at firstname.lastname@example.org if you require an
explanation of this.