Control time with strings like '(Pacific/Auckland)now/d+5d6h'
- The string is checked against iso8601 and returned if valid
- (optional) "(Timezone)" at the start (defaults to UTC)
- (optional) "now" or another identifier (defaults to now)
- A series of operations that add or remove durations, round to the start of duration mesurements and change the timezone of the operations.
now= The current timestamp in UTC(Pacific/Auckland)now= The current timestamp in the current timezone for Pacific/Auckland+1day= The current timestamp plus one day in UTC/day+1day= The start of today plus one day, so the start of tomorrow in UTC(Pacific/Auckland)/week= The start of the week in Pacific/Auckland/w+d5h= One day 5 hours after the start of the week in UTC+5h/d= The start of the day in five hours time in UTC(UTC)/w(Pacific/Auckland)+4h= The start of the UTC week, plus four hours in the Pacific/Auckland timezone (e.g. for daylight savings)/d(Pacific/Auckland)= The start of UTC today in Pacific/Auckland time