I use ISO 8601 full timestamps in UTC. They were carefully designed so that collation order is identical to temporal order. Which is convenient! If you need

I use ISO 8601 full timestamps in UTC. They were carefully designed so that collation order is identical to temporal order. Which is convenient! If you need interval logic, though, SQLite won't help you, and epoch is the better choice. It's possible to solve some queries with a regex, but you won't love it.