pin = 17
activehigh = 1
freq = 1000
maxzero = 16
maxone = 30
summermonth = 3
wintermonth = 10
leapsecmonths = 6,12

pin = 17
activehigh = 1
freq = 1000
maxzero = 16
maxone = 30
summermonth = 3
wintermonth = 10
leapsecmonths = 3,6,9,12

Add March and September as months which can have leap seconds.
Add March and September as months which can have leap seconds.

Obtained from "ITU-R, "Recommendation ITU-R TF.460-6 - Standard-frequency and time-signal emissions", February 2002."
via http://tools.ietf.org/html/draft-ietf-avtcore-leap-second-05#ref-6
