by now; around this time今ごろ means “around now” or “around this time,” while は adds emphasis or contrast. It can refer to the present in hypothetical statements or to the corresponding time on another day, week, or year.
JA: 来月の今ごろは、新しい仕事を始めているでしょう。
EN: Around this time next month, I’ll have started my new job.