He could call for it but I think Pelosi and McConnell control timing.
The constitution says the timing is up to him.
“he may, on extraordinary Occasions, convene both Houses, or either of them, and in Case of Disagreement between them, with Respect to the Time of Adjournment, he may adjourn them to such Time as he shall think proper;”
https://usconstitution.net/xconst_A2Sec3.html