1. Celebrate St Patrick's Day at this three-day extravaganza taking place over the weekend in Trafalgar Square. The St Patrick’s Day Parade and Festival will see over 125,000 turning out for Irish food, dancing and a giant parade featuring pageantry, floats and music. Plus, it's all totally free.
2. Is a feminist internet possible? Find out at the Feminist Internet Geekender, a weekend of talks at the Photographers' Gallery on topics such as online nipple policing, closing with a late gallery takeover. Entry is £4 for each day.
3. Don't miss the big multi-venue cultural love-in that is OpenFest at the Barbican. It's aiming to inject some creativity into the Square Mile, with standout event ‘Tunnel Visions: Array’ seeing Beech Street taken over by a hypnotic installation with digital projections and a soundtrack by the BBC Symphony Orchestra. Entry is free.