Like most other people, the daily life of a pirate would vary depending on what was happening that day.
One thing to make quite clear is that very little of it was spent fighting or plundering. It is generally reckoned that the most successful pirate in terms of the number of ships captured was Bartholomew Robert, who is estimated to have captured around 400 ships in around about 33 months. That's an average of 12 ships a month, say 2.5-3 per week. In fact, on more than one occasion he took large numbers of vessels in one go, such as when he plundered the Newfoundland fishing fleet over the course of a few days. So even the most successful pirate company spend less than, say, two days a week fighting and plundering. Henry Every, one of the most successful pirates in terms of value of spoil, captured seven ships in nearly two years, and two of them were on the same day. Weeks or even months between captures was not unusual for pirates. The rest of the time, pirate ships operated much like any other ship during the period. Evidence from the trial of members of Sam Bellamy's crew tells us that they used watch bills to regulate the working rota, and pirate ships needed the same level of work as any other ship. One difference may have been that pirates had a slightly smaller workload than crews of other ships because they tended to have large crews relative to the size of their vessels. So, in addition to the job of actually sailing their vessel - navigating, trimming sails etc - pirates also had to spend time on the maintenance of their vessels, repairing worn out parts, cleaning etc. Amongst all of that, the general commerce of life went on of course, cooking, cleaning, washing clothes, mending clothes...
To be honest, it would be possible to write a book on the day to day life of pirates. Would you care to narrow the question down?