Time periods that span more than 1 year are automatically dealt with Requests of large numbers of files are split ... that have changed (splitted/merged) some codes are only valid for certain times.

Python and ECMWF ecCodes packaged in a Docker container to allow for easy processing of GRIB2 and BUFR files. If you have a local grib file some-file.grib2 and you want to run grib_ls on this file: ...