Do not backdate it. State when authority actually began and assess the relevant employment and process using accurate dates.
Preserve the chronology
A desired qualifying period cannot be created by changing a document date.
Only after closing, because the qualifying relationship does not exist until ownership has actually transferred, and only once the transferee's one continuous year abroad falls within the prior three years. L-1A timing depends on the qualifying employment record and the proposed petition, while a new office must show sufficient physical premises and a credible development plan for the executive or managerial role. Use the foreign employment record as the anchor, then map corporate approvals, premises, staffing plans, petition preparation, and the employee’s notice period around it. If the strongest continuous twelve-month stretch occurred before the layoff, delaying the petition risks pushing that period outside the three-year lookback entirely, leaving only the post-rehire period available, and that period may not yet reach a full year. A common timing error is filing around a polished future chart while employment agreements or reporting changes still have unresolved effective dates.