One simultaneously opens a long and a short option position on an asset with different expiration dates, but the same strike price. (skoptionstrading.com)
I expect that this may be more difficult given that at any given time, a stock may have many different options trading with different expiration dates and strike prices. (money.stackexchange.com)
All three shopping portals are offering the same bonus, just with different expiration dates. (dannydealguru.com)