Tiny update: Timedesc 0.9.0 has been released, moving sexplib dependency into timedesc-sexp and moved from mparser to angstrom for some date time text parsers since angstrom is a strict necessity for some binary (de)serialization already.
This overall means Timedesc is about as slim as it can get as a date time handling lib, depending only on: seq, angstrom, result, and ptime (ptime is not a strict dependency, but it’s nice to have timedesc <-> ptime convertors).