How Do I aggregate Data By Day and Still Respect Timezone?

Question

We are currently using a summary table that aggregates information for our users on an hourly basis in UTC time. The problem we are having is that this table is becoming too la

Answer 1

Summarise the data in tables with a timeoffset column, and a "day" field (a date) that is the day for that particular summary line. Index on (timeoffset, day, other relevant fields), clustered if possible (presumably PostgresSQL has clustered indexes?) and all should be well.