Yes, input type = “week” exists and allows you to add date consisting of a year and a week number encoded according to ISO 8601. You can add it to the following:
<!DOCTYPE HTML> <html> <body> <form action = "/cgi-bin/html5.cgi" method = "get"> Week : <input type = "week" name = "newinput" /> <input type = "submit" value = "submit" /> </form> </body> </html>