It depends on which edition of The Legal 500 you are submitting for.
We publish over 10 different editions, and each has its own deadline. Click the link below to find the submission deadline for the edition you want to submit for:
Asia Pacific; Canada; Caribbean; Deutschland (in English); Deutschland (in German); Europe, Middle East & Africa (EMEA); Latin America; United Kingdom (Solicitors); United Kingdom (The Bar); United States
There is also a Deadlines Calendar which contains all deadlines (for all editions), on a month-by-month basis.