The Energetic Particle Telescope (EPT) is a compact (max. 128 x 162 x 212 mm^3, 4.6 kg, <6 Watt) instrument designed to perform contamination-free measurements of electron (0.3 – 30 MeV), proton (4 – 300 MeV) and He ion (16 – 1000 MeV) energy spectra in the space environment. It was designed on the basis of the EPT concept developed at UCL/CSR and which includes modularity as one of the most important EPT inherent features. The EPT day provides potential users with an opportunity to in-beam operate the Engineering Model (EM) and note the instrument performances. Moreover, keynote speakers will deliver seminars on science-class space instruments requirements, possible EPT applications and other supporting activities.