:sig
function time_format_utc(format : string = "", timestamp : u64 = 0) string

:params
format : date format
timestamp : Unix timestamp. Zero uses the current time

:returns
formatted UTC time

:content
`time_format_utc` formats a Unix timestamp in UTC.

:example capy render
print(time_format_utc("%Y", u64(5)), "\n")

:see-group
time
