an tseachtain seo chugainn
The expression by next week means before the next week starts. The expression within the next week means during the coming 6-7 days.
Next Irish general election happened on 2016-04-08.
lá an tseachtain
The proper way to say it is next week's interview. It has to be possessive. Example: You need to be prepared for next week's interview.
is next week June 4th
"Next week" refers to the upcoming week after the current one. For example, if today is Thursday, next week would start on Monday.
IS
See you next week.
Correctly, "The new members' group will meet next week."
"Will ski" is a form of the future tense. "They will ski next week." You also have other ways like: "They shall ski next week." "They are going to ski next week." "They might ski next week."
about 2500 a week
soon but not next week