Why don't Jiff's strftime and strptime routines validate the format string separately from formatting or parsing a datetime?
github.com/BurntSushi/j...
github.com/BurntSushi/j...
Why don't Jiff's `strftime` and `strptime` routines validate the format string separately from formatting or parsing a datetime? · BurntSushi jiff · Discussion #560
I've been considering moving from chrono to jiff. So far, I've been liking what I'm reading, especially when it comes to time zones. However, one thing stood out to me. That's the strftime and strp...
github.com
May 26, 2026 at 3:37 AM
Why don't Jiff's strftime and strptime routines validate the format string separately from formatting or parsing a datetime?
github.com/BurntSushi/j...
github.com/BurntSushi/j...
My regrettable tattoo would be getting all the arguments to strftime on my forearm
October 21, 2025 at 9:03 PM
My regrettable tattoo would be getting all the arguments to strftime on my forearm
ooh, this is nice -- strftime reference and playground
for figuring out the weird combination of identifiers you want for specific date and time formatting: e.g. "%B %d, %Y"
www.strfti.me
for figuring out the weird combination of identifiers you want for specific date and time formatting: e.g. "%B %d, %Y"
www.strfti.me
strftime reference and sandbox for Ruby, Python, PHP, and C programmers
Quickly test date and time formats in a strftime sandbox with a handy reference.
www.strfti.me
December 11, 2024 at 8:02 PM
ooh, this is nice -- strftime reference and playground
for figuring out the weird combination of identifiers you want for specific date and time formatting: e.g. "%B %d, %Y"
www.strfti.me
for figuring out the weird combination of identifiers you want for specific date and time formatting: e.g. "%B %d, %Y"
www.strfti.me
sexy strftime() man
bringing back my most viral tweet for spooky season
October 25, 2025 at 2:08 AM
sexy strftime() man
strptime vs strftime
strPtime has the P for “parse time”
So it'll accept a string and Parse a time from it.
strFtime has the F for “from time” or “format time”
So it'll accept a time/date/datetime and Format it as a string.
You're welcome 🤗
strPtime has the P for “parse time”
So it'll accept a string and Parse a time from it.
strFtime has the F for “from time” or “format time”
So it'll accept a time/date/datetime and Format it as a string.
You're welcome 🤗
October 26, 2025 at 12:12 PM
strptime vs strftime
strPtime has the P for “parse time”
So it'll accept a string and Parse a time from it.
strFtime has the F for “from time” or “format time”
So it'll accept a time/date/datetime and Format it as a string.
You're welcome 🤗
strPtime has the P for “parse time”
So it'll accept a string and Parse a time from it.
strFtime has the F for “from time” or “format time”
So it'll accept a time/date/datetime and Format it as a string.
You're welcome 🤗
shoutout to my favorite reference doc on the internet strftime.org
Python strftime reference cheatsheet
A quick reference for Python's strftime formatting directives.
strftime.org
December 6, 2025 at 6:57 AM
shoutout to my favorite reference doc on the internet strftime.org
Having a tough time remembering #Python strptime vs. strftime?
- The "p" (strptime) is for parsing, getting a datetime from a string
- The "f" (strftime) is for formatting, getting a string from a datetime
For help remembering the format codes, turn to buff.ly/oEdYGMI !
- The "p" (strptime) is for parsing, getting a datetime from a string
- The "f" (strftime) is for formatting, getting a string from a datetime
For help remembering the format codes, turn to buff.ly/oEdYGMI !
April 11, 2026 at 3:30 PM
Having a tough time remembering #Python strptime vs. strftime?
- The "p" (strptime) is for parsing, getting a datetime from a string
- The "f" (strftime) is for formatting, getting a string from a datetime
For help remembering the format codes, turn to buff.ly/oEdYGMI !
- The "p" (strptime) is for parsing, getting a datetime from a string
- The "f" (strftime) is for formatting, getting a string from a datetime
For help remembering the format codes, turn to buff.ly/oEdYGMI !
Need help putting together a format string in #Python #Pandas? Check out the site strfti.me, an interactive tool that makes it easy. (It works with a variety of other programming languages, too.)
strftime reference and sandbox for Ruby, Python, PHP, and C programmers
Quickly test date and time formats in a strftime sandbox with a handy reference.
strfti.me
December 26, 2024 at 11:56 AM
First time hearing about pym.dev/strptime, like those regex testers but for strftime so it's a real lifesaver
November 13, 2024 at 6:15 PM
First time hearing about pym.dev/strptime, like those regex testers but for strftime so it's a real lifesaver
To remember that you need strptime for parsing instead of strftime, remember that it's "string parse time" and "string format time".
Read more 👉 https://trey.io/l4b84k
#Python
Read more 👉 https://trey.io/l4b84k
#Python
July 8, 2026 at 1:17 AM
To remember that you need strptime for parsing instead of strftime, remember that it's "string parse time" and "string format time".
Read more 👉 https://trey.io/l4b84k
#Python
Read more 👉 https://trey.io/l4b84k
#Python
I guess in the interest of fairness I’ll mention a “weird” thing that #golang does that I actually really like: its replacement for strftime % elements.
February 23, 2026 at 6:37 PM
I guess in the interest of fairness I’ll mention a “weird” thing that #golang does that I actually really like: its replacement for strftime % elements.
I've completed "Work with datetime's strptime and strftime" on @pybites.bsky.social 🐍🎉 - pybitesplatform.com/bites/work-w...
Pybites Platform
pybitesplatform.com
January 2, 2025 at 11:37 PM
I've completed "Work with datetime's strptime and strftime" on @pybites.bsky.social 🐍🎉 - pybitesplatform.com/bites/work-w...
#DAY37, Part 2 of #PixHabit ✔️ #100DaysOfCode
Built the Pixela graph today:
• POST request
• Added headers/body
• Printed response
• Added daily “pixel”
• Auto date with strftime()
Part 3 next ✨
#Python #API #buildinpublic
Built the Pixela graph today:
• POST request
• Added headers/body
• Printed response
• Added daily “pixel”
• Auto date with strftime()
Part 3 next ✨
#Python #API #buildinpublic
December 10, 2025 at 1:01 PM
#DAY37, Part 2 of #PixHabit ✔️ #100DaysOfCode
Built the Pixela graph today:
• POST request
• Added headers/body
• Printed response
• Added daily “pixel”
• Auto date with strftime()
Part 3 next ✨
#Python #API #buildinpublic
Built the Pixela graph today:
• POST request
• Added headers/body
• Printed response
• Added daily “pixel”
• Auto date with strftime()
Part 3 next ✨
#Python #API #buildinpublic
Coming up on 5 years of scraping the NS Power outage map. One thing I'm always interested in is how many "Vehicle Accident" outages there are:
2021 142
2022 185
2023 137 (incomplete data)
2024 186
2025 147 (so far)
Last December had 35 so still time for this year to catch up!
2021 142
2022 185
2023 137 (incomplete data)
2024 186
2025 147 (so far)
Last December had 35 so still time for this year to catch up!
outages: select strftime('%Y', first_observed) as year, count(*) from outage_summaries where last_cause='Vehicle Accident' and date(first_observed) > '2021' group by 1
nsp.datasette.danp.net
November 29, 2025 at 1:37 PM
Coming up on 5 years of scraping the NS Power outage map. One thing I'm always interested in is how many "Vehicle Accident" outages there are:
2021 142
2022 185
2023 137 (incomplete data)
2024 186
2025 147 (so far)
Last December had 35 so still time for this year to catch up!
2021 142
2022 185
2023 137 (incomplete data)
2024 186
2025 147 (so far)
Last December had 35 so still time for this year to catch up!
javascriptにstrftime()がないのほんと不便
September 14, 2025 at 3:11 AM
javascriptにstrftime()がないのほんと不便
Coding goals for the day:
SQL Daily Challenge:✅
Banki Review (SQL): ✅
Today I learned about the STRFTIME() function in SQL, which is really good for filtering dates
SQL Daily Challenge:✅
Banki Review (SQL): ✅
Today I learned about the STRFTIME() function in SQL, which is really good for filtering dates
December 13, 2024 at 5:05 AM
Coding goals for the day:
SQL Daily Challenge:✅
Banki Review (SQL): ✅
Today I learned about the STRFTIME() function in SQL, which is really good for filtering dates
SQL Daily Challenge:✅
Banki Review (SQL): ✅
Today I learned about the STRFTIME() function in SQL, which is really good for filtering dates
The inane but ubiquitous `strptime` and `strftime` support:
February 11, 2025 at 2:55 AM
The inane but ubiquitous `strptime` and `strftime` support:
Haven’t looked closely or compared, but www.foragoodstrftime.com has long been a go to for me.
For a Good Strftime | Easy Skeezy Ruby Date/Time Formatting
www.foragoodstrftime.com
December 11, 2024 at 8:18 PM
Haven’t looked closely or compared, but www.foragoodstrftime.com has long been a go to for me.
I've been programming for 15 years, and for the love of Saint Linus, I can never remember the arguments for strftime
August 19, 2025 at 2:41 PM
I've been programming for 15 years, and for the love of Saint Linus, I can never remember the arguments for strftime
my week: https://lists.haxx.se/pipermail/daniel/2026-June/000159.html
summer of bliss, pending release, HTTPS-RR, strftime, QUERY
summer of bliss, pending release, HTTPS-RR, strftime, QUERY
June 20, 2026 at 8:25 PM
my week: https://lists.haxx.se/pipermail/daniel/2026-June/000159.html
summer of bliss, pending release, HTTPS-RR, strftime, QUERY
summer of bliss, pending release, HTTPS-RR, strftime, QUERY
👋 My data (starting Dec 2020) dominated by Fiona as expected. But this month now has the 8th-most observed outages.
outages: select strftime('%Y-%m', first_observed) as month, count(*) from outage_summaries group by 1 order by 2 desc limit 20
nsp.datasette.danp.net
December 20, 2025 at 11:24 PM
👋 My data (starting Dec 2020) dominated by Fiona as expected. But this month now has the 8th-most observed outages.
Python Tip #258 (of 365):
Format dates with f-strings. 🧵
datetime objects support the same format codes in f-string format specifiers that the strftime method uses:
>>> deadline = datetime(2046, 10, 31, 15, 46)
>>> f"{deadline:%m/%d/%Y %I:%M %p}"
'10/31/2046 03:46 PM'
#Python #DailyPythonTip
Format dates with f-strings. 🧵
datetime objects support the same format codes in f-string format specifiers that the strftime method uses:
>>> deadline = datetime(2046, 10, 31, 15, 46)
>>> f"{deadline:%m/%d/%Y %I:%M %p}"
'10/31/2046 03:46 PM'
#Python #DailyPythonTip
September 15, 2026 at 5:01 PM
Python Tip #258 (of 365):
Format dates with f-strings. 🧵
datetime objects support the same format codes in f-string format specifiers that the strftime method uses:
>>> deadline = datetime(2046, 10, 31, 15, 46)
>>> f"{deadline:%m/%d/%Y %I:%M %p}"
'10/31/2046 03:46 PM'
#Python #DailyPythonTip
Format dates with f-strings. 🧵
datetime objects support the same format codes in f-string format specifiers that the strftime method uses:
>>> deadline = datetime(2046, 10, 31, 15, 46)
>>> f"{deadline:%m/%d/%Y %I:%M %p}"
'10/31/2046 03:46 PM'
#Python #DailyPythonTip
I finished my goals earIy today. I even got a chance to do some networking & meet some cool new people!
Coding goals for the day:
SQL Daily Challenge:✅
Banki Review (SQL): ✅
Today the STRFTIME() function in SQL returned with a vengeance, but it really is a good way to filter dates
Coding goals for the day:
SQL Daily Challenge:✅
Banki Review (SQL): ✅
Today the STRFTIME() function in SQL returned with a vengeance, but it really is a good way to filter dates
December 20, 2024 at 12:50 AM
I finished my goals earIy today. I even got a chance to do some networking & meet some cool new people!
Coding goals for the day:
SQL Daily Challenge:✅
Banki Review (SQL): ✅
Today the STRFTIME() function in SQL returned with a vengeance, but it really is a good way to filter dates
Coding goals for the day:
SQL Daily Challenge:✅
Banki Review (SQL): ✅
Today the STRFTIME() function in SQL returned with a vengeance, but it really is a good way to filter dates
Compare this f-string:
>>> f"Published on {deadline:%B %d, %Y}"
'Published on October 31, 2046'
To this strftime call:
>>> "Published on " + deadline.strftime("%B %d, %Y")
'Published on October 31, 2046'
I usually prefer f-strings here: I'm used to reading them, so they feel more natural.
>>> f"Published on {deadline:%B %d, %Y}"
'Published on October 31, 2046'
To this strftime call:
>>> "Published on " + deadline.strftime("%B %d, %Y")
'Published on October 31, 2046'
I usually prefer f-strings here: I'm used to reading them, so they feel more natural.
September 15, 2026 at 5:01 PM
Compare this f-string:
>>> f"Published on {deadline:%B %d, %Y}"
'Published on October 31, 2046'
To this strftime call:
>>> "Published on " + deadline.strftime("%B %d, %Y")
'Published on October 31, 2046'
I usually prefer f-strings here: I'm used to reading them, so they feel more natural.
>>> f"Published on {deadline:%B %d, %Y}"
'Published on October 31, 2046'
To this strftime call:
>>> "Published on " + deadline.strftime("%B %d, %Y")
'Published on October 31, 2046'
I usually prefer f-strings here: I'm used to reading them, so they feel more natural.
a lot of people use the moment library.
You can pass a configuration object to Date.toLocaleDateString, it’s about the same as Intl.DateTimeFormat
It’s not quite c strftime(), but it’s probably usable.
It is odd that there isn’t a strftime since javascript engines are usually implemented in c++
You can pass a configuration object to Date.toLocaleDateString, it’s about the same as Intl.DateTimeFormat
It’s not quite c strftime(), but it’s probably usable.
It is odd that there isn’t a strftime since javascript engines are usually implemented in c++
July 12, 2025 at 4:56 PM
a lot of people use the moment library.
You can pass a configuration object to Date.toLocaleDateString, it’s about the same as Intl.DateTimeFormat
It’s not quite c strftime(), but it’s probably usable.
It is odd that there isn’t a strftime since javascript engines are usually implemented in c++
You can pass a configuration object to Date.toLocaleDateString, it’s about the same as Intl.DateTimeFormat
It’s not quite c strftime(), but it’s probably usable.
It is odd that there isn’t a strftime since javascript engines are usually implemented in c++