The current document, titled ’D4.5 Reports on all webinars’, has been developed within the framework of the TIME4CS project which is funded by the European Union’s Horizon 2020 Research and Innovation Programme under Grant Agreement No 101006201. The purpose of this Deliverable is to report on the production of 10 webinars under Task 4.3. The webinars were part of the TIME4CS training program (D4.1, D4.2 and D4.3 First - Second and Final respectively - versions of the Description of TIME4CS training programs) and as such were developed taking into consideration the key concepts, capabilities and infrastructures that are essential for researchers and other staff engaged in the design, execution, support and evaluation of citizen science activities. The document firstly provides information about the objectives and methodologies applied for the webinars’ development (Chapter 2) and then it provides information about the concept, format, target, collaboration with other EU initiatives and webinars’ promotion (Chapter 3). For each webinar, reference material is provided in Chapter 4. Finally, details of webinar participation are provided in Chapter 5 and the strategy for the webinars’ sustainability is outlined in Chapter 6.