Dwight D. Eisenhower:

Initially Eisenhower planned on serving only one term, but as with other decisions, he maintained a position of maximum flexibility in case leading Republicans wanted him to run again. During his recovery from a heart attack late in 1955, he huddled with his closest advisors to evaluate the GOP's potential candidates; the group, in addition to his doctor, concluded a second term was well advised, and he announced in February 1956 he would run again. Eisenhower was publicly noncommittal about Nixon's repeating as the Vice President on his ticket; the question was an especially important one in light of his heart condition. He personally favored Robert B. Anderson, a Democrat, who rejected his offer; Eisenhower then resolved to leave the matter in the hands of the party. In 1956, Eisenhower faced Adlai Stevenson again and won by an even larger landslide, with 457 of 531 electoral votes and 57.6% of the popular vote. The level of campaigning was curtailed out of health considerations.

Please answer a question about this article. If the question is unanswerable, say "unanswerable". When did Eisenhower make an announcement stating that he would run for a second term?
February 1956