Verb conjugation of "zurückstellen" in German

Work was performed only in June, July, August and September. In October and November, Erik has been waiting for Katja's visit and Sabine was on maternal leave after Christmas and New Year.
You have to be careful when you go on summer vacation. There are many dangers but the most dangerous one is the sun itself, because if you're not careful it may harm you. People underestimate the rays.
Right now I'm looking for a new job. Actually, I feel good, although I've had a cold for a few days. I can not get past autumn without catching a cold and I cough usually until spring.