First execution on no RTC devices
Devices with no real time clock will fail on first playbook installation.
No packages can be installed because the apt-update may return lists with future dates.
and fixing the clock requires ntpdate installed,
a workaround is the following:
apt-get -o Acquire::Check-Valid-Until=false -o Acquire::Check-Date=false update
perhaps those options would be enabled until the clock is sync at least optionally.