U.S. DST reminder

This coming Sunday, those of us in the U.S. switch to Daylight Savings
Time.

This is a reminder that tv_grab_na_dd *DOES NOT* use "timezones" (CST,
CDT, etc) but "time offsets" which are not effected by DST. 

If you ask tv_grab_na_dd for -0500 time offset right now, that's what
you'll get next week.  It's up to the final application to report the
data in a local timezone (which will change)

If your application depends on tv_grab_na_dd's time offset feature,
you'll have to manually make the change for DST.

You can probably deal with Sunday doing something like this
    _dd --config-file STD.dat --offset 0 --days 6 --output STD.XML
    _dd --config-file DST.dat --offset 6 --days 1 --output DST.XML
     tv_cat STD.XML DST.XML >guide.xml

Of course the offsets and days change each day, and the time offset in
DST.dat is +100 from STD.dat.
 
btw.. last fall I changed tv_check to handle the DST switch, it works!
:)

Robert


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