Here are some obvious cards that can tell you something about timing - especially when considered within the context of where they're placed around other cards in the layout.
Eight of Wands - can indicate speed - so right side up, sooner than later and reversed, not so much
The Sun - besides the usual meaning can indicate summer, or daytime instead of night and reversed, the opposite
Five of Pentacles - can indicate winter, and reversed, after winter
Knights - have a look at the horse... is it moving? stagnent? racing? to the issue or away?
Three of Cups - can indicate harvest time - fall
Ten of Wands -can signal a long way off
Just remember, don't beat up the cards for specific dates. Daydoonlikethat :)
Gaylle & Wendy
The Whispering Path