help! pill talk

I've started the pill and I've got lots of different people telling me different things.
Can I take the pill at 7 everyday but at around 9 on weekends ?
Do I have to take it the same time everyday to be affective ?
When would be advisable to take the pill - morning or evening ? 
^ what time in the morning and evening do people take it, bare in mind I am a full time sixth form student too so not really sure when to take it 

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