How can I show the week number on Google Calendar?
Thanks @Janis. This is a perfect solution for mondays. But for people their workweek starts on sundays, here is better solution: https://sites.google.com/site/gcalweeknumbers/ (Using Ctrl-F, Search for the word sundays and click the link). Also the above-linked page has better icon style, with more contrast, which might be useful for people whose calendar starts on mondays as well.