Articles are used before countable nouns. The time means the required duration, which is countable in terms of mins/hours, for a particular activity.

However, time, in general, is not countable.

Articles are used before countable nouns. The time means the required duration, which is countable in terms of mins/hours, for a particular activity.

However, time, can also be uncountable based on the context.

English Grammar on time