I don't know how to reply you guys one by one on this website, a bit confusing haha. I'm confused using the timeline as well, but I have been living in the US for almost 15 yrs.
I really appreciate all the replies. My kids' summertime usually start on June 9th till August 17th. But as some of you said that I can always have option to expedite my US passport process, I will do that then.
You guys are the best!! Thanks!!