gistfile1.txt

      value_template: >
          {% set time = states('sensor.nasbox_uptime')|int %}
          {% set minutes = ((time % 3600) / 60) | int %}
          {% set hours = ((time % 86400) / 3600) | int %}
          {% set days = (time / 86400) | int %}

          {%- if time < 60 -%}
            Less than a minute
          {%- else -%}
            {%- if days > 0 -%}
              {%- if days == 1 -%}
                1 day
              {%- else -%}
                {{ days }} days
              {%- endif -%}
            {%- endif -%}
            {%- if hours > 0 -%}
              {%- if days > 0 -%}
                {{ ', ' }}
              {%- endif -%}
              {%- if hours == 1 -%}
                1 hour
              {%- else -%}
                {{ hours }} hours
              {%- endif -%}
            {%- endif -%}
            {%- if minutes > 0 -%}
              {%- if days > 0 or hours > 0 -%}
                {{ ', ' }}
              {%- endif -%}
              {%- if minutes == 1 -%}
                1 minute
              {%- else -%}
                {{ minutes }} minutes
              {%- endif -%}
            {%- endif -%}
          {%- endif -%}