HelenOS sources
RECURSE 858 uspace/lib/c/generic/time.c RECURSE("%Y-%m-%d %H:%M:%S");
RECURSE 867 uspace/lib/c/generic/time.c RECURSE("%m/%d/%y");
RECURSE 873 uspace/lib/c/generic/time.c RECURSE("%+4Y-%m-%d");
RECURSE 882 uspace/lib/c/generic/time.c RECURSE("%b");
RECURSE 915 uspace/lib/c/generic/time.c RECURSE("%I:%M:%S %p");
RECURSE 918 uspace/lib/c/generic/time.c RECURSE("%H:%M");
RECURSE 930 uspace/lib/c/generic/time.c RECURSE("%H:%M:%S");
RECURSE 949 uspace/lib/c/generic/time.c RECURSE("%Y-%m-%d");
RECURSE 953 uspace/lib/c/generic/time.c RECURSE("%H:%M:%S");
HelenOS homepage, sources at GitHub