Formal:
* Eagerly anticipate: This emphasizes the excitement and anticipation.
* Look forward to: This is a more neutral way to express anticipation.
* Be impatient for: This emphasizes the eagerness and possibly some frustration at having to wait.
* Long for: This suggests a deep desire for something.
Informal:
* Excited about: This emphasizes the positive emotions associated with the event.
* Can't hold back: This implies a strong desire to do something immediately.
* Burning to: This conveys a strong sense of excitement and impatience.
* Raring to go: This emphasizes the eagerness to start something.
* Dying to: This suggests a very strong desire for something.
Other options:
* Ticked off the calendar: This is a playful way to express anticipation.
* Counting down the days: This is a more specific way to express how much time is left.
* Can't wait to see: This is specific to the event being something you are looking forward to witnessing.
The best synonym to use will depend on the specific situation and the tone you want to convey.