Does the time of day you have Sex matters if you're TTC?

Jannice
I ask because whenever Glow tells me it's Peak Day, we have sex, but we always do it at night, usually after 10:30pm and I wonder if that's too late at night and maybe that's why we haven't been able to conceive. Also, we try to have sex the day before Peak Day and the day after, just in case... but always at night. We've been trying since May 2015.