LC_TIME value isn't applied correctly

Binary package hint: locales

Time in Spanish must be in 24-hour format by default, so "9:45 PM" must be shown as "21:45".

However, LC_TIME value is incorrect. In Evolution Mail, for instance, the date/time displayed in the Date filed of the mail list shows in AM/PM format, rather than the correct 24-hour format.

My actual locale is:

ricardo@kadath:~$ locale
LANG=es_ES.UTF-8
LC_CTYPE="es_ES.UTF-8"
LC_NUMERIC="es_ES.UTF-8"
LC_TIME="es_ES.UTF-8"
LC_COLLATE="es_ES.UTF-8"
LC_MONETARY="es_ES.UTF-8"
LC_MESSAGES="es_ES.UTF-8"
LC_PAPER="es_ES.UTF-8"
LC_NAME="es_ES.UTF-8"
LC_ADDRESS="es_ES.UTF-8"
LC_TELEPHONE="es_ES.UTF-8"
LC_MEASUREMENT="es_ES.UTF-8"
LC_IDENTIFICATION="es_ES.UTF-8"
LC_ALL=
ricardo@kadath:~$

With the above setup, Evolution Mail shows dates in AM/PM format. However, if I start Evolution with the following:

ricardo@kadath:~$ LC_TIME=es_ES evolution

then the dates shows correctly in 24-hour format.