How to prevent merge at certain times of the week

[DanielTian]

Hi, I tried to use Conditional merge check to prevent merge  after 1 PM on Tuesday but I failed. I wrote the codes below in ScriptRunner and I got a lot of Static type checking errors like "Script15.groovy: 1: [Static type checking] - You tried to call a method which is not allowed: java.util.Calendar#getInstance()".

def cal = Calendar.instance
TimeZone tz = TimeZone.getTimeZone("Asia/Tokyo");
cal.setTimeZone(tz);
def hour = cal.get(Calendar.HOUR_OF_DAY)
Calendar.TUESDAY == cal.get(Calendar.DAY_OF_WEEK)&&hour >= 13

It seems that Calendar can't be used here and I want to know is there any other way to prevent merge at certain times of the week?