Number 1 cylinder is the front cylinder....1..2..3..4 front to back.
It was easier for the manufactures to balance the engine, to prevent vibrations, if the firing order was 1342.
1342
1342
1342
firing order for all 4 cyl. is 1342
The firing order is 1342 where the no. 1 plug is on the front of the engine.
1342 on 4 cylinder engine
1342
1342
If the engine in your Civic is a 4 cylinder then the Firing order is 1342
1342 in an anti clock direction.
1342