I was still thinking about this when I came home, as I walked through the complex our flat is in I noticed that one of our neighbours were obviously setting up to have people over for Diwali - they had fairy lights up everywhere and were cleaning furiously. Later that night I could hear the laughter and talking coming from their balcony.
It seems strange that people live so close to us, yet we have nothing to do with them. I wouldn't have thought they were celebrating a festival except that I knew about it from work. People around me have significant days and festivals that I have no idea of.
I'm not exactly sure why I thought about it so much. It all seems so disconnected and fragmented - living within cms of people and yet having no idea what makes them tick.