the national day (day of german unity) and the may day (labor day) are governed by federal law.

How would the previous sentence be correctly capitalized?
Answer: The National Day (Day of German Unity) and the May Day (Labor Day) are governed by federal law.
possibility of comparing new and old products

How would the previous sentence be correctly capitalized?
Answer: Possibility of comparing new and old products
now finally save the data in the location that is favored by you

How would the previous sentence be correctly capitalized?
Answer: Now finally save the data in the location that is favored by you
we work closely with leading plastic manufacturers and plastic development companies, in order to assure that our products are of a consistent superior quality.

How would the previous sentence be correctly capitalized?
Answer: We work closely with leading plastic manufacturers and plastic development companies, in order to assure that our products are of a consistent superior quality.