That the SDS1104X-E does not keep date and time is really annoying when saving PNGs or other files to a USB stick.
I still have not given up hope that a future firmware update will let the scope fetch the time via NTP.
But as tv84 and BillB have pointed out elsewhere, you can set date and time via SCPI. Then the scope will time-stamp saved files correctly until the next power cycle.
To make life a little easier I now run the simple python script below to set the date and time. Note, that I assigned a static IP address to my scope.
Once I get tired of that I might turn it into a cron job or systemd service on some Raspberry Pi I use for home automation.
import visa, time
rm = visa.ResourceManager()
inst = rm.open_resource('TCPIP::192.168.1.99::INSTR')
inst.write(':SYST:DATE ' + time.strftime('%Y%m%d'))
inst.write(':SYST:TIME ' + time.strftime('%H%M%S'))