Calendar Spread
A Calendar Spread is when derivatives such as futures and options are entered into a short and long position at the same time with the same underlying asset – but with the Calendar Spread they are entered into with different expiration dates or different delivery months.
The Calendar Spread is often called an Interdelivery, Interdelivey Spread, Horizontal Spread, or IntraTime Spread. A Calendar Spread example would be having a short e-Mini Gold contract for the next month out, while also having a long e-Mini Gold contract with delivery expiration date six months out.