Either:
15th of January.
Or 1 day between 19-21st of January.
USAGE
Northern Hemisphere — 6 months (may-oct or june-nov)
Southern Hemisphere — 6 months (nov-april or dec-may) — reverse seasonality, 1 season behind
Digital (paid/organic social + ecom), Print, OOH, In-store (both owned and wholesale). No Cinema or TV rights needed.