What did I do wrong that I made a mistake about not putting a day and date of month and did send another message with date, month and day?

made a mistake about adding the day and month and date of. I sent another message saying No 5 of December did seen one of the text . and hasn't got back after I text one more. Then think about texting. Before this he was very eager to meet up and always reply back to me. I know sometimes guys can be busy. I am not sure what to do and my mum wrote down something in my notebook to use to text back. He's not online. Other messages that I sometimes sent. Hello, are you going to be busy just let me know thanks? . This will work more than once and do work. I should just move on or just wait and see.