As much as it is important to observe the correct times, it is also important to observe the preferable times for intercourse to attain maximum benefit, especially for the child-to-be.
Hazrat Ali (Radiyallahu-Anhum) observes in WSAYA: “The result of conception as a result of copulation;
-On Monday night, is a child that will be a Qari;
-On Tuesday, a generous, big-hearted child;
-On Thursday, an upright, Allah-fearing Aalim or a wise, sagacious child;
-On Friday before Juma, a child born with luck and fortune who will attain martyrdom at death;
-On Friday night, a sincere child-RIFAATUL-MUSLIMEEN
N.B. By night is meant the Islamic night, which precedes the day.