Congratulations on the 8th of March to all women here!

In case anyone hasn't seen it yet:

10th of March, 16:00 UTC:
https://www.hackerrank.com/womens-codesprint-3
The contest lasts for two days, prizes worth $11,000.
Previous women's contest at Hackerrank lasted for a day, contestants' level was rather high: all the tasks were solved by more than 100 persons, though it wasn't that easy.

11th of March, 17:00 UTC:
https://sites.google.com/site/codejamtoioforwomen/
Lasts for two and a half hours, top-150 are invited to attend Google I/O conference.
Last year's tasks were easier than those at regular GCJ qualification round. I guess the contest was poorly announced, so it lacked participants, all the tasks were solved by 14 persons, and to reach top-150 it was enough to get 45 points out of 100.

UPD:
https://www.codechef.com/MARCH17
Lasts until 13th of March, 10:30 UTC. Top-10 girls are awarded with 300 laddus (inner currency of codechef). Any other month, top-5 girls are awarded the same prizes in case they reach top-100.

UPD2:
There is also one on HackerEarth, it started today and will last a few days https://www.hackerearth.com/challenge/competitive/international-women-hackathon-2017/

Good luck!