is_after() walkthrough 16.2

gistfile1.txt

In [7]: t1 = mytime.Time(2013, 1, 1, 12)

In [8]: t1.date.ctime()
Out[8]: 'Tue Jan  1 12:00:00 2013'

In [9]: t2 = mytime.Time(2013, 1, 1, 1)

In [10]: t2.date.ctime()
Out[10]: 'Tue Jan  1 01:00:00 2013'

In [11]: mytime.is_after(t1, t2)
Out[11]: True

Here we can see that 12 is interpreted as 12PM and 1 is interpreted as 1AM, so is_after() reports that t1 is chronologically after t2 which is correct. If we put 12 to indicate midnight and 1 to indicate 

In [16]: t3 = mytime.Time(2013, 1, 1, 0)

In [17]: t3.date.ctime()
Out[17]: 'Tue Jan  1 00:00:00 2013'

t3 is interpreted as 12am

In [18]: t4 = mytime.Time(2013, 1, 1, 13)

In [19]: t4.date.ctime()
Out[19]: 'Tue Jan  1 13:00:00 2013'

t4 is interpreted as 1pm

In [20]: mytime.is_after(t3, t4)
Out[20]: False

In this case t3 is earlier than t4 and is_after() reports that correctly.