The phrase "a time when critics" is correct and usable in written English.
It can be used to refer to a specific period or moment in which critics expressed their opinions or evaluations about something, such as a work of art, literature, or performance.
Example: "There was a time when critics hailed the film as a masterpiece, but opinions have since changed."
Alternatives: "an era when critics" or "a period when critics".
This was a time when critics of the tax cut were ridiculed for saying exactly the same thing.
The pitch will underscore the Republican obstructions Mr. Obama has faced, and a time when critics across the political spectrum are assailing a "do-nothing Congress".
At a time when critics contend that Sept. 11 reflected a significant intelligence failure, Ms. White said, "no one should be quick to point fingers or affix blame".
At a time when critics are writing books with names such as Film After Film: Or, What Became Of 21st-Century Cinema?
The fresh revelations also come at a time when critics have been pressing for a radical overhaul of the monetary fund.
Overseas buying of UK apartments has ignited considerable political controversy at a time when critics say Britain is building fewer than half the number of homes it needs for an expanding population.
Like Courbet and Manet before them, the Impressionist artists advocated radical new theories of painting, taking on the role of critical advocacy at a time when contemporary critics were often not supportive of avant-garde developments.
I don't really feel anything about a critic's opinion, because I came from a time when a critics opinion didn't mean sh-t, and their opinion still won't mean sh-t.
At a time when book critics are campaigning against shrinking word counts for reviews, such brevity is pretty controversial.
However, Mr. Bernanke also defended the Fed's autonomy, at a time when some critics in Congress have called for auditing its monetary policy.
His writing in the 1960s for Mulligan's Concert Jazz Band and the Thad Jones-Mel Lewis Jazz Orchestra helped invigorate the big-band genre at a time when many critics considered it moribund.
