There is a very fine website, Universalis, which gives all sorts of information for the whole of the liturgical year. 
Among many other things, it gives:
- Details of the life of the Saint of the Day
- Readings for each day
- Readings for each Sunday throughout the year, so that these can be looked at in advance (invaluable for those preparing as Readers at Mass)
- All of the Daily Offices, including Morning Prayer and Evening Prayer of the Church