Using "When" and "Where"

[Ed]

Writers,

Please be conscious of using the words "where" and "when." "When" should be used in cases that describe time, and "where" should be used in cases that describe location.

Correct:
During your lunch break, when sating your hunger is the only thing on your mind, reach for a healthy snack.

Incorrect,
During your lunch break, where sating your hunger is the only thing on your mind, reach for a healthy snack.

Thanks,
Ed