The challenge thread is up.  lets go .  anyone and everyone. 
http://www.primegrid.com/forum_thread.php?id=9706#150796
 
From the thread:
 
Welcome to the World Emoji Day Challenge

The fifth challenge of the 2021 Series will be a 3-day challenge in celebration of what is arguably the internet's most momentous and culturally significant holiday: World Emoji Day. The challenge will be offered on the GFN-17-Low subproject, beginning 17 July 22:00 UTC and ending 20 July 22:00 UTC.

As Obi-Wan almost 😲 said, emojis 😍 surround us, penetrate 👉 us, 😽 and bind the internet 🌐💻 together. In 👏 total there are 🔢😻 3,521 emojis 😊 in the 💻 Unicode Standard, as of 🤔💰 September 2020. The most recent 🔌📆 emoji release is Emoji 13.1, which ✌ added 217 new emojis. This 👈 figure includes sequences for gender, ♂♀ skin tone, flags, and the components that are used to 😱🎉 create 📲 keycap, flag, 🏳 and 👏 other sequences.

World Emoji Day is celebrated annually on July 17th in honor 😘 of the date 👫 shown on the calendar emoji 📅, which 👏🐱 itself was 👏💦 picked because it was the date that iCal for Mac was first 🥇 announced at MacWorld Expo in 2002. One could argue it's 😏 rather frivolous and 👏🤠 arbitrary in the scope of "World" holidays, but there's no 💦denying the scope of 👊 impact that 👫😐 emoji have had 😩 on internet culture. The #WorldEmojiDay hashtag alone 🙃🙀 generates 4 billion impressions per year.

To participate in the Challenge, please select only the GFN-17-Low subproject in your PrimeGrid preferences section.

This started a little while ago. In 14th place right now.

We moved up one more spot to 11th.
Glad this one is over. Too hot out to be running PG.

From the challenge thread.
 
And we're done! Here are the final stats. And I do apologize for missing the end reminder -- I literally slept through my alarm :') Cleanup tasks are available now, should take about 2 weeks.

Challenge: World Emoji Day
App: 24 (GFN-17-Low)
(As of 2021-07-21 03:40:34 UTC)

1226801 tasks have been sent out. [CPU/GPU/anonymous_platform: 493941 (40%) / 732860 (60%) / 0 (0%)]

Of those tasks that have been sent out:

34554 (3%) were aborted. [20250 (2%) / 14304 (1%) / 0 (0%)]
19385 (2%) came back with some kind of an error. [455 (0%) / 18930 (2%) / 0 (0%)]
1129491 (92%) have returned a successful result. [455033 (37%) / 674458 (55%) / 0 (0%)]
21815 (2%) are still in progress. [8556 (1%) / 13257 (1%) / 0 (0%)]

Of the tasks that have been returned successfully:

21418 (2%) are pending validation. [8385 (1%) / 13013 (1%) / 0 (0%)]
1108037 (98%) have been successfully validated. [446622 (40%) / 661435 (59%) / 0 (0%)]
41 (0%) were invalid. [28 (0%) / 13 (0%) / 0 (0%)]
1 (0%) are inconclusive. [1 (0%) / 0 (0%) / 0 (0%)]

The current leading edge (i.e., latest work unit for which work has actually been sent out to a host) is b=30891232. The leading edge was at b=26442546 at the beginning of the challenge. Since the challenge started, the leading edge has advanced 16.82% as much as it had prior to the challenge!