export: Use DATE_FIELDS in floatify_datetime_fields.
export: Use DATE_FIELDS in floatify_datetime_fields.

This avoids a little bit of code duplication, plus it should
make it a little easier to add new date fields in the future.

verma-varsha/zulip,cosmicAsymmetry/zulip,zacps/zulip,calvinleenyc/zulip,grave-w-grave/zulip,vabs22/zulip,krtkmj/zulip,SmartPeople/zulip,Jianchun1/zulip,cosmicAsymmetry/zulip,jphilipsen05/zulip,susansls/zulip,SmartPeople/zulip,ryanbackman/zulip,punchagan/zulip,SmartPeople/zulip,ryanbackman/zulip,amanharitsh123/zulip,dhcrzf/zulip,susansls/zulip,zulip/zulip,TigorC/zulip,verma-varsha/zulip,jphilipsen05/zulip,amyliu345/zulip,jphilipsen05/zulip,KingxBanana/zulip,SmartPeople/zulip,andersk/zulip,hackerkid/zulip,brockwhittaker/zulip,mahim97/zulip,dawran6/zulip,umkay/zulip,jrowan/zulip,christi3k/zulip,blaze225/zulip,zulip/zulip,mohsenSy/zulip,aakash-cr7/zulip,cosmicAsymmetry/zulip,mohsenSy/zulip,calvinleenyc/zulip,eeshangarg/zulip,arpith/zulip,zacps/zulip,Juanvulcano/zulip,AZtheAsian/zulip,calvinleenyc/zulip,sharmaeklavya2/zulip,showell/zulip,eeshangarg/zulip,sup95/zulip,niftynei/zulip,jackrzhang/zulip,j831/zulip,KingxBanana/zulip,Galexrt/zulip,sharmaeklavya2/zulip,andersk/zulip,paxapy/zulip,ahmadassaf/zulip,rht/zulip,shubhamdhama/zulip,j831/zulip,ahmadassaf/zulip,niftynei/zulip,reyha/zulip,mahim97/zulip,hackerkid/zulip,Galexrt/zulip,brainwane/zulip,zulip/zulip,Jianchun1/zulip,vaidap/zulip,vabs22/zulip,dhcrzf/zulip,Diptanshu8/zulip,isht3/zulip,blaze225/zulip,amanharitsh123/zulip,joyhchen/zulip,mahim97/zulip,eeshangarg/zulip,j831/zulip,souravbadami/zulip,tommyip/zulip,brockwhittaker/zulip,samatdav/zulip,punchagan/zulip,jphilipsen05/zulip,timabbott/zulip,timabbott/zulip,umkay/zulip,dattatreya303/zulip,mohsenSy/zulip,calvinleenyc/zulip,ahmadassaf/zulip,joyhchen/zulip,showell/zulip,synicalsyntax/zulip,hackerkid/zulip,krtkmj/zulip,cosmicAsymmetry/zulip,j831/zulip,joyhchen/zulip,dawran6/zulip,niftynei/zulip,punchagan/zulip,dawran6/zulip,eeshangarg/zulip,brainwane/zulip,Juanvulcano/zulip,Diptanshu8/zulip,christi3k/zulip,tommyip/zulip,dhcrzf/zulip,hackerkid/zulip,mahim97/zulip,rishig/zulip,shubhamdhama/zulip,shubhamdhama/zulip,sonali0901/zulip,AZtheAsian/zulip,paxapy/zulip,Juanvulcano/zulip,brockwhittaker/zulip,JPJPJPOPOP/zulip,grave-w-grave/zulip,punchagan/zulip,PhilSk/zulip,brockwhittaker/zulip,timabbott/zulip,jackrzhang/zulip,andersk/zulip,krtkmj/zulip,shubhamdhama/zulip,zacps/zulip,tommyip/zulip,peguin40/zulip,AZtheAsian/zulip,reyha/zulip,zulip/zulip,amyliu345/zulip,amyliu345/zulip,rishig/zulip,Jianchun1/zulip,umkay/zulip,sup95/zulip,cosmicAsymmetry/zulip,kou/zulip,sonali0901/zulip,vikas-parashar/zulip,sup95/zulip,AZtheAsian/zulip,rishig/zulip,TigorC/zulip,Jianchun1/zulip,verma-varsha/zulip,hackerkid/zulip,tommyip/zulip,ahmadassaf/zulip,dhcrzf/zulip,shubhamdhama/zulip,jphilipsen05/zulip,susansls/zulip,peguin40/zulip,susansls/zulip,verma-varsha/zulip,sup95/zulip,PhilSk/zulip,amyliu345/zulip,rht/zulip,jrowan/zulip,j831/zulip,showell/zulip,zulip/zulip,krtkmj/zulip,ryanbackman/zulip,samatdav/zulip,j831/zulip,peguin40/zulip,calvinleenyc/zulip,hackerkid/zulip,dawran6/zulip,Diptanshu8/zulip,arpith/zulip,jainayush975/zulip,paxapy/zulip,sharmaeklavya2/zulip,punchagan/zulip,kou/zulip,sonali0901/zulip,ahmadassaf/zulip,souravbadami/zulip,kou/zulip,AZtheAsian/zulip,christi3k/zulip,sharmaeklavya2/zulip,brainwane/zulip,Galexrt/zulip,reyha/zulip,jrowan/zulip,hackerkid/zulip,SmartPeople/zulip,paxapy/zulip,PhilSk/zulip,shubhamdhama/zulip,reyha/zulip,brockwhittaker/zulip,jainayush975/zulip,amanharitsh123/zulip,vabs22/zulip,reyha/zulip,synicalsyntax/zulip,brainwane/zulip,blaze225/zulip,showell/zulip,Galexrt/zulip,vikas-parashar/zulip,jrowan/zulip,peguin40/zulip,vaidap/zulip,souravbadami/zulip,punchagan/zulip,jainayush975/zulip,vikas-parashar/zulip,jphilipsen05/zulip,KingxBanana/zulip,dattatreya303/zulip,niftynei/zulip,synicalsyntax/zulip,synicalsyntax/zulip,jackrzhang/zulip,Galexrt/zulip,krtkmj/zulip,timabbott/zulip,rht/zulip,vikas-parashar/zulip,andersk/zulip,KingxBanana/zulip,samatdav/zulip,jackrzhang/zulip,jrowan/zulip,calvinleenyc/zulip,isht3/zulip,ahmadassaf/zulip,aakash-cr7/zulip,vikas-parashar/zulip,timabbott/zulip,eeshangarg/zulip,timabbott/zulip,mohsenSy/zulip,Diptanshu8/zulip,umkay/zulip,showell/zulip,Jianchun1/zulip,blaze225/zulip,aakash-cr7/zulip,isht3/zulip,arpith/zulip,vabs22/zulip,samatdav/zulip,brainwane/zulip,arpith/zulip,dattatreya303/zulip,niftynei/zulip,TigorC/zulip,TigorC/zulip,grave-w-grave/zulip,tommyip/zulip,KingxBanana/zulip,kou/zulip,dhcrzf/zulip,jackrzhang/zulip,samatdav/zulip,zacps/zulip,rht/zulip,Juanvulcano/zulip,rishig/zulip,vabs22/zulip,paxapy/zulip,paxapy/zulip,isht3/zulip,grave-w-grave/zulip,souravbadami/zulip,Juanvulcano/zulip,souravbadami/zulip,dawran6/zulip,susansls/zulip,brockwhittaker/zulip,shubhamdhama/zulip,aakash-cr7/zulip,zacps/zulip,sonali0901/zulip,verma-varsha/zulip,jainayush975/zulip,sup95/zulip,niftynei/zulip,dattatreya303/zulip,umkay/zulip,blaze225/zulip,KingxBanana/zulip,kou/zulip,vaidap/zulip,tommyip/zulip,cosmicAsymmetry/zulip,amyliu345/zulip,ryanbackman/zulip,eeshangarg/zulip,krtkmj/zulip,kou/zulip,susansls/zulip,samatdav/zulip,amanharitsh123/zulip,reyha/zulip,andersk/zulip,isht3/zulip,rishig/zulip,blaze225/zulip,synicalsyntax/zulip,rht/zulip,Diptanshu8/zulip,dattatreya303/zulip,amanharitsh123/zulip,Diptanshu8/zulip,Juanvulcano/zulip,jainayush975/zulip,showell/zulip,mahim97/zulip,sup95/zulip,rht/zulip,TigorC/zulip,dhcrzf/zulip,mohsenSy/zulip,arpith/zulip,sharmaeklavya2/zulip,ahmadassaf/zulip,brainwane/zulip,vaidap/zulip,JPJPJPOPOP/zulip,vikas-parashar/zulip,jrowan/zulip,jainayush975/zulip,timabbott/zulip,amanharitsh123/zulip,jackrzhang/zulip,showell/zulip,andersk/zulip,joyhchen/zulip,rht/zulip,kou/zulip,jackrzhang/zulip,grave-w-grave/zulip,joyhchen/zulip,PhilSk/zulip,synicalsyntax/zulip,JPJPJPOPOP/zulip,christi3k/zulip,TigorC/zulip,grave-w-grave/zulip,vaidap/zulip,sonali0901/zulip,zulip/zulip,isht3/zulip,SmartPeople/zulip,eeshangarg/zulip,PhilSk/zulip,vaidap/zulip,Jianchun1/zulip,arpith/zulip,brainwane/zulip,peguin40/zulip,rishig/zulip,dhcrzf/zulip,souravbadami/zulip,ryanbackman/zulip,joyhchen/zulip,Galexrt/zulip,umkay/zulip,aakash-cr7/zulip,mohsenSy/zulip,Galexrt/zulip,mahim97/zulip,JPJPJPOPOP/zulip,zulip/zulip,krtkmj/zulip,dawran6/zulip,JPJPJPOPOP/zulip,christi3k/zulip,rishig/zulip,christi3k/zulip,peguin40/zulip,vabs22/zulip,zacps/zulip,amyliu345/zulip,sharmaeklavya2/zulip,synicalsyntax/zulip,ryanbackman/zulip,sonali0901/zulip,dattatreya303/zulip,JPJPJPOPOP/zulip,verma-varsha/zulip,punchagan/zulip,AZtheAsian/zulip,umkay/zulip,tommyip/zulip,andersk/zulip,PhilSk/zulip,aakash-cr7/zulip