Solar settings

I'm not too familiar with northern time zones and daylight savings, etc. - but hoping someone could give me a definitive answer on this.

I need to do an accurate solar study for a location in Montana, USA.

For MID-SUMMER my settings are as follows;

and for MID-WINTER, they are;

Please would someone verify that my GMT Offset and Daylight Savings settings are correct in both cases.

Thanks,

Max

08.11.09.919