Calendar.txt uses the ISO-8601 standard, where weeks start on Monday.
But you should use whatever works for you. If you want to use the US system, you can easily adapt to this. The short Go code for generating the template is on calendar.txt homepage.
But you should use whatever works for you. If you want to use the US system, you can easily adapt to this. The short Go code for generating the template is on calendar.txt homepage.