I'm reviewing and updating a translation of gnome-panel, and struggling with some translations for which the parameters are not explained. Thank you for the many comments that are already given.

Many strings use %A, %b, or %B, etc. and I'm not sure what these refer to.

#: ../applets/clock/calendar-window.c:226 ../applets/clock/clock.c:347
msgid "%l:%M %p"
msgstr "%l:%M %p"

#: ../applets/clock/calendar-window.c:228 ../applets/clock/clock.c:349
#: ../applets/clock/clock.c:1256
msgid "%H:%M"
msgstr "%H:%M"

I assume these two (^) refer to some time formatting function which might be documented somewhere.

#. Translators: If the event did not start on the current day
#. * we will display the start date in the most abbreviated way
#. * possible.
#: ../applets/clock/calendar-window.c:234
msgid "%b %d"
msgstr ""

I'm affraid I'm not sure what event is referred to here or how that influences the translation or what %b or %d is. 


#: ../applets/clock/clock.schemas.in.h:12
A list of timezone IDs. Each ID identifies an individual timezone. The settings of these timezones are stored in the $(id)_name and $(id)_zone keys.

I guess that ..._name and ..._zone are something like configuration keys that should not be translated. Please confirm with a comment in the file. Where do these strings appear? Thanks for any help you can provide.