Let's try to meet on the second Saturday of each month for now, and if we can't do that, let's meet one of the other Saturdays.
ーLet's try to meet on the second Saturday of each month for now, and if we can't do that, let's meet one of the other Saturdays.
「とりあえず毎月第２土曜に会うようにしよう。会えない時は、他の土曜日に会おう」
meet on the second Saturday of each month で「毎月第二土曜に会う」
for now で「今のところ、とりあえず、ひとまず」
meet one of the other Saturdays で「どれか他の土曜に会う」
ご参考まで！
For months when that doesn't work, let's do a different Saturday!
ご質問ありがとうございます。
「都合が合わない」はschedules don't matchとかtiming doesn't line upなどに訳せます。上記にthat doesn't workを「都合が合わない」の英訳として使っています。that doesn't workはdoesn't work with our schedulesの省略です。そして、thatは「第二土曜に集めること」です。
例文：Let's meet on the second Saturday of every month. For months when that doesn't work, let's do a different Saturday.
ご参考になれば幸いです。
カナダ 
アメリカ合衆国 
