When it comes to setting a date for a meeting, event, or deadline, there are many alternative phrases that you can use instead of "affix a date to." Some possible synonyms might include "schedule," "fix a date," "set a deadline," "pencil in a date," "book a time," "arrange a meeting," "plan an event," or "mark a date in the calendar." Depending on the context and your personal style, any of these phrases could be a suitable replacement for "affix a date to," allowing you to communicate your desired timeframe and expectations more clearly and effectively.