Size: 60cm x 30cm 2025 Hatsune Miku Square Calendar. This calendar features incredible images of the amazing Hatsune Miku, a vocaloid voicebank based on a 16 year old girl character. She is seen as virtual pop idol performing songs for her audiences both on screen and as a holographic image at live concerts. This official Calendar has plenty of room for all your notes and appointments in the large monthly date panels provided.