DST changed from 1.5 hr to 0.5 Hr. What difference would it make for my scheduled flight time 11:42?

My Flight from Austin,Tx. was booked 7 months ago when DST was 1.5 Hr. Now that it has changed to .5 Hr. what difference would it make if My departure

My Flight from Austin,Tx. was booked 7 months ago when DST was 1.5 Hr. Now that it has changed to .5 Hr. what difference would it make if My departure time was 11:42a when booked.

or:My Flight from Austin,Tx. was booked 7 months ago when DST was 1.5 Hr. Now that it has changed to .5 Hr. what difference would it make if My departure time was 11:42a when booked.

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