"the last time when" is a correctly worded phrase that is usable in written English.
Example sentence: I went to the beach the last time when it was sunny.
Isaiah Oggins left home the last time when Robin was just a boy.
"This is the last time when we all get together so it's quite sad.
The last time, when I saw her through a door, through glass, I looked away.
"Unlike the last time, when he was treated like he was under house arrest".
The Thriller era was also the last time when Jackson looked like himself.
Not for the last time, when commercial and public interests collided on Broadway, commerce prevailed.
"I think they learned from the last time, when the Supreme Council of Armed Forces was in power.
Some hark back to the 150 years after 1700, the last time when Japan's population and economic growth stagnated.
"I saw him the last time when they came to bring me my house keys," Ms. Carmichael said.
I can't remember the last time when everyone was so desperate for an England batsman to make a century.
Stu doesn't want another insane night of revelry, like the last time, when Doug Justin Barthaa) got married.
