Datetime

new datatype datetimeinfo

Hosts year, month, day, hour.

Also has prev_year and so on private. These are needed to get is_new_year,...

Everything is updated on increment. With this lots of code is not distributed and doubled over mrm_eval, mhm_eval and mrm_write_fluxes.

datetimeinfo also contains iLAI and yID since these integers are fully derived by datetimeinfo and used often.