Date of second dose

[Ergel]

I received my first dose of Pfizer vaccine December 25. I'm currently scheduled to get second dose January 18th. Considering trying to move up the second dose so I can leave the country (have a sick grandmother). Anyone know where it's published how soon it's safe/effective to get the second dose?

[iAm]

https://www.cdc.gov/vaccines/covid-19/info-by-product/clinical-considerations.html

Per CDC:
Second doses administered within a grace period of ≤4 days from the recommended date for the second dose are considered valid; however, doses administered earlier do not need to be repeated. The second dose should be administered as close to the recommended interval as possible. However, there is no maximum interval between the first and second dose for either vaccine.

[Ergel]

https://www.cdc.gov/vaccines/covid-19/info-by-product/clinical-considerations.html

Per CDC:
Second doses administered within a grace period of ≤4 days from the recommended date for the second dose are considered valid; however, doses administered earlier do not need to be repeated. The second dose should be administered as close to the recommended interval as possible. However, there is no maximum interval between the first and second dose for either vaccine.

Thanks, meaning 17-25 days?