havedate: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/havedate - from package: weboob

You may install the required package with command apt-get install {package}

Error in other languages:
havedate: bevel nie gevind nie
havedate: comandă negăsită
havedate: comando não encontrado
havedate: commande introuvable
havedate: command not found
havedate: käsku ei ole
havedate: không tìm thấy lệnh
havedate: komanda nerasta
havedate: Kommando nicht gefunden.
havedate: kommandot finns inte
havedate: komut yok
havedate: nie znaleziono polecenia
havedate: níor aimsíodh an t-ordú
havedate: no se encontró la orden
havedate: no s'ha trobat l'ordre
havedate: opdracht niet gevonden
havedate: parancs nem található
havedate: perintah tidak ditemukan
havedate: príkaz nenájdený
havedate: příkaz nenalezen
havedate: команда не найдена
havedate: командата не е открита
havedate: 命令找不到
havedate: コマンドが見つかりません