Hi Shashank,
If you want to send reminder emails daily except for weekends, you will have to use a variable in the formula field provided in timer activity. In this variable, you have to assign an interval at which a reminder should be sent. This value is considered as a number of minutes. For an exception of the weekend, you have to write a code to check what is the current day and calculate the number of minutes accordingly (in case of Saturday and Sunday add the number of minutes) and store in a variable.
Kindly try this out and let us know in case of any issue.
Best Regards,
Fujitsu RunMyProcess Support