The documents may have been canceled. For convenience, here is the documentation for strftime:
Time: STRFTIME ()
Convert datetime string to another format
Usage
time:strftime(`<string>`,`<format>`)
strftime POSIX strftime.
time:strftime(xTime,"%F %T")
time:strftime(xTime,"%F")
time:strftime(xTime,"%T")
time:strftime(xTime,"%A %d %b %Y")
time:strftime(xTime,"%c")
:
time: now()
datetime,
Usage
time:now()
time:now({"tz" : <timezone>)
: ()
RFC 3339 ( )
Usage
time:new() # Equivalent to time:now()
time:new(<string>)
datetime ISO8601 (v2000).
: ()
( )
Usage
time:add(<string>,{<unit> : n})