This dates back to 29a3729 from PHPC-536, but should no longer be necessary as of 6eaa91b for PHPC-1982, which switched gettimeofday() to the libbson compat function.
is related to
PHPC-1982Use bson_gettimeofday for Windows compatibility
Closed
PHPC-536UTCDateTime constructor should default to current time and accept DateTimeInterface