生成bash脚本以处理日期时间戳

I have thousands of backup files that are of the general format PICU_XX-YYYYYYYYYYY.Stp, where XX is a number and YYYYYYYYY is a Unix timedate stamp. Searching these files manually is difficult and erroneous when I use the windows file date and time. I want to be able to search for these files by using the unix datetime stamp generated. I have thousands of backup files that are of th