ケイティ・ザカリアが報道官に就任したのは... ？

This market will resolve to “Yes” if Katie Zacharia ceases to be White House Press Secretary for any period of time between market creation and the specified date, 11:59 PM ET. Otherwise, this market will resolve to “No”. An announcement of Katie Zacharia's resignation/removal by this market's end date will immediately resolve this market to "Yes", regardless of when the announced resignation/removal goes into effect. If Katie Zacharia has not yet taken office as White House Press Secretary at market creation, this market will also resolve to "Yes" if, by the specified date, 11:59 PM ET, her appointment is withdrawn or it is announced that she will not take the position. The resolution source for this market will be official information from Katie Zacharia and the U.S. government; however, a consensus of credible reporting may also be used.