I used to read many books about God and time. These scattered thoughts were developed from those studies:
Notes on Divine Temporality
Advocates for Divine temporality (Stephen T. Davis, Richard Swinburne, John Sanders, Nick Wolterstorff, Terence Fretheim, William Hasker, William Lane Craig, Alvin Plantinga, F. Pike, Greg Boyd, and Clark Pinnock).
Other side: Brian Leftow, Richard Creel, Brian Davies, Paul Helm.
1) Possible atemporal causation definition: S possibly brings it about that X happens @ t1-contiguity with space-time
2) Divine episteme: Can a timeless being know temporal particulars directly/immediately qua temporal particulars? Thomas Aquinas and Augustine seem to answer no.
3) In my estimation, it is logically possible (maybe metaphysically possible) that timeless events are impossible.
However, what about the event of God generating/creating the only-begotten Son?