Comment 11 for bug 886532

OK, as a workaround, like suggested by patola above, I used the export command. I just noticed that a single:

#!/bin/sh
export LANG="en_US"
gkrellm

script is enough (unless you don't like your calendar in English).

This bug seems related to libpango, since pango is mentioned in the gkrellm configuration for the date format.