Can past sense verb follow “in this moment”?

I’m confused about the tense of this sentence:

Now they’re in this moment where they were planning to release a bill last week.

Is it grammatically correct? And I also want to know whether there’s any difference between “in this moment where” and “ in this moment when”. Thanks！

Solution 1:

It is grammatically correct but does not show the best idiomaticity, in my opinion. Something such as the following would have seemed more usual to me.

• Now they've reached this moment [during which/when/where] they were planning to release a bill last week.

There is no difference as to meaning; "where" can be used to stand for places, situations and stages (Cambridge Dictionary). The particular moment mentioned can be identified to a given situation or stage in a progression. The given form used communicates somewhat different connotations. For instance the same general idea could have been written like so:

• "Now they are at the point where they were planning to release a bill last week.".