Rheinland-Pfalz
If a child is required to attend school, parents will receive a letter from the school administration office in their city or township about ten to eleven months before school starts. They are asked to register their child at a primary school. The letter mentions the responsible primary school and the registration date. The dates are also announced in the local press or in the day care centers (https://grundschule.bildung-rp.de/uebergaenge/einschulung/anmeldung-von-schulkindern.html).