Past date transactions

I’m trying to install sambapos to my cafe. Is it possible to enter past date transactions to system? I want to start from last month and enter all sales, payments etc. day by day to system.

It would be wise to just pick a starting point and start there. You should not try and backdate it will cause more issues than its worth. You can create holding accounts and starting balances etc for the accounting. But entering backdated tickets etc would not be wise.