I did all my injections in the morning, except the trigger which was in the evening. We weren't told when to do the daily injections, but DH and I worked out that the morning was more convenient for us because:

DH would get me out of bed to do the injection and be there to help me out if necessary (he wasn't always at home in the evenings);

Mornings were easier because we would both be at home (trying to organise an injection whilst out at the movies or having dinner with friends just didn't work for us);

And morning injections just fit better with our routine (get up, eat breakfast, inject, have a shower, etc).

What ever suits you - and good luck!