Every sheet starts on now, and every sheet can be set to the real time. Log it whenever you remember, and it lands in the right place in the day.
A quick chip
For something like a diaper or a bottle, the time row has Now, an earlier chip or two, and Custom. Tap the one that is closest.

Custom: turn the clock
Custom opens Choose a time. Turn the hour, the minutes and AM or PM, then tap Done.

Started a timer late
A sleep, a feed or a pump started before you opened the app? Under Started earlier?, tap −5m, −15m, −30m or Custom before you start it. The timer counts from then.

A whole session after the fact
With Already finished, the Session time card opens a wheel for the start, and a Duration or End time for the end.

