I post on Saturday mornings, EDT, but I honestly don't know the best times to post, especially if you're new.
I've read somewhere that the time and day where you can get the most hits may depend on the genre(s), though I don't remember the exact details of it. I don't follow the rules.
I'd say do it when it suits you, but try to do it as consistently as possible-build up a schedule or else your readers won't take you seriously or ADD out of reading. I found that posting consistently helps with views, though it may enable many to not have to subscribe, which may be unfortunate if that's what you're after. I could be wrong on this too, but I don't have a lot of subs, and that may actually be down to not self-promoting enough, which is the next step.
I think it all comes down to persistence and patience, but I'm still learning the Tapas ways here. Maybe you'll get luckier than I?
I wish you a pleasant Tapas journey, and I'll give your comic a lookie!