Multi sheets multi times copy to new workbook during the month?

Can anybody help me about VBA code? I attached here one files and one screenshots. “63 Current OLD” file is source and main file, “63 New May” file is destination file. Anyway, “63 Current OLD” file had sheets 10021, 10022, 10023, 10024, 10025 and already copied to , “63 New May” file. Today, “63 Current OLD” file have sheets 10026 to 10032 I want to copy to “63 New May” file. Tomorrow maybe sheets will create 10033 to 10040, day after tomorrow maybe create sheets 10041 to 10050. So, during the current (May) month different days sheets I want to copy to “63 New May” file.
Next month create a new file which name will be “63 New June”. After next month new file which name will be “63 New July” etc., So, every month sheets will copy to new file many times and every month new file’s name will change. In this situations what will be code? I am not expert in VBA code. Please, help me if you can and wish.
Thank you for your time!!!

Am I understanding you right that from one file (Old) you want to copy the sheets that do not exist in the other file (New) to the other file (New).
Will the book where you want to copy into (New) be open? If not, what is the path?
Your picture shows 5 sheets with different names before the sheet naming starts with "100". So we need to check from the 6th sheet on if the sheet exist.

Hello jolivanes
Yes, old file always same, and New file will be created in a month once. Say, this month new file name will be “63 June”, next month file name will be “63 July”, after next “63 August” etc.,
Sheets name always different, say, 10010, 10011 etc., or Chalan 0001, Chalan 0002, it can be any name. Actually, I want that in a month new file create once and sheets from old file will be copy to new file many times in a month (say, copy 20 times and maybe 100 sheets, so each day 5 sheet average). I hope now you understand.
Thank you for your time!

It sounds to me that you want to save certain files as a new workbook.
The easiest would be to just delete the file and create a new one every time you want or delete all the sheets in the file and copy the new sheets into it.
Do you create the file manually before or does it need to be created through the code?