Nucleosides are key structures for current drug development and have established roles as antivirals and anticancer agents. Their (poly)phosphorylated nucleotide counterparts are critical tools for chemical biology and sequencing technologies. In recent years, nucleotides have also become fundamental building blocks for the preparation of altered genes and coding systems for synthetic biology. This meeting seeks to explore and celebrate the chemistry that drives the development of modern nucleoside and nucleotide chemistry. It will bring together scientists who work at the interfaces of synthetic and biological chemistry to deliver new tools and insights for biology, and new leads for drug development.