Leading zero is always output, even for 12-hour display

[majick]

The large clock always outputs leading zero, even when 12 hour display is selected. In the United States it is customary to omit this digit when displaying the time in 12-hour format. Most users in this region expect the time to look like '%l:%M %p

This line should be conditional on 24-hour mode or a value >9.

tty-clock/ttyclock.c

Line 256 in f2f847c

draw_number(ttyclock.date.hour[0], 1, 1);

[mashtonian]

Alternatively can tty-clock use the glibc extensions to strftime to allow for inclusion of hyphen and underscore (etc) modifiers to remove or replace padding?

As detailed in the man page for strftime.