Hi OlafBso! Is your question in regards to weekly progress weigh-ins? If so, you can weigh-in anytime throughout the week :-) The week begins each Thursday just after midnight (PST) and ends every Wednesday night at 11:59 PM (PST). You can choose when you'd like to submit within that time frame.
Please note initial and final weigh-ins must be submitted during the designated timeframes for each game and must be submitted through your game page. Hope this helps! :-)