I have reviewed the Texas timezone history before 1970.<br><br>I attach my result, which proposes two additional Texas zones America/Houston and Amerca/Amarillo.<br><br>I think there is an error in the current tzdata/northamerica file regarding Texas. It claims that Texas follows America/Chicago. <br>
But this is not the case as Texas had no DST in 1936, as Chicago did.<br><br>Please check my data and my typing, as I am a bad typist.<br>