My parents become US permanent residents on May 27 1997. They had several trips outside the US which lasted anywhere from a few months to 2 years with a reentry permit. During the time they were out, I continued to claim them as my dependent on my tax returns. However for the last 5 years, they are trying to maintain continuous residence (please see below). When is the earliest they can apply for naturalization?
Mom Travel dates
Arrived on Sept 16 2016 - Departed on Dec 5 2016
Arrived on May 4 2017 - Departed on Jun 5 2017
Arrived on May 16 2018 - Departed on Nov 7 2018
Arrived on June 24 2019 and stayed
Dad Travel dates
Arrived on Sept 16 2016 - Departed on Dec 5 2016
Arrived on May 4 2017 - Departed on Jun 5 2017
Arrived on May 16 2018 - Departed on Aug 4 2018
Arrived on Sept 4 2018 - Departed on Nov 7 2018
Arrived on June 24 2019 and stayed
Mom Travel dates
Arrived on Sept 16 2016 - Departed on Dec 5 2016
Arrived on May 4 2017 - Departed on Jun 5 2017
Arrived on May 16 2018 - Departed on Nov 7 2018
Arrived on June 24 2019 and stayed
Dad Travel dates
Arrived on Sept 16 2016 - Departed on Dec 5 2016
Arrived on May 4 2017 - Departed on Jun 5 2017
Arrived on May 16 2018 - Departed on Aug 4 2018
Arrived on Sept 4 2018 - Departed on Nov 7 2018
Arrived on June 24 2019 and stayed